diff --git a/src/gpu/effects/GrConvolutionEffect.cpp b/src/gpu/effects/GrConvolutionEffect.cpp
index 15f2aeb..0dd1606c 100644
--- a/src/gpu/effects/GrConvolutionEffect.cpp
+++ b/src/gpu/effects/GrConvolutionEffect.cpp
@@ -19,8 +19,8 @@
 
     GrGLConvolutionEffect(const GrProgramStageFactory& factory,
                           const GrCustomStage* stage);
-    virtual void setupVSUnis(VarArray* vsUnis, int stage) SK_OVERRIDE;
-    virtual void setupFSUnis(VarArray* fsUnis, int stage) SK_OVERRIDE;
+    virtual void setupVariables(GrGLShaderBuilder* state,
+                                int stage) SK_OVERRIDE;
     virtual void emitVS(GrGLShaderBuilder* state,
                         const char* vertexCoords) SK_OVERRIDE;
     virtual void emitFS(GrGLShaderBuilder* state,
@@ -38,12 +38,12 @@
     
 protected:
 
-    unsigned int   fKernelWidth;
-    GrGLShaderVar* fKernelVar;
-    GrGLShaderVar* fImageIncrementVar;
+    unsigned int         fKernelWidth;
+    const GrGLShaderVar* fKernelVar;
+    const GrGLShaderVar* fImageIncrementVar;
  
-    GrGLint fKernelLocation;
-    GrGLint fImageIncrementLocation;
+    GrGLint              fKernelLocation;
+    GrGLint              fImageIncrementLocation;
 
 private:
 
@@ -61,33 +61,17 @@
     fKernelWidth = static_cast<const GrConvolutionEffect*>(data)->width();
 }
 
-void GrGLConvolutionEffect::setupVSUnis(VarArray* vsUnis,
-                                        int stage) {
-    fImageIncrementVar = &vsUnis->push_back();
-    fImageIncrementVar->setType(kVec2f_GrSLType);
-    fImageIncrementVar->setTypeModifier(
-        GrGLShaderVar::kUniform_TypeModifier);
-    (*fImageIncrementVar->accessName()) = "uImageIncrement";
-    fImageIncrementVar->accessName()->appendS32(stage);
-    fImageIncrementVar->setEmitPrecision(true);
+void GrGLConvolutionEffect::setupVariables(GrGLShaderBuilder* state,
+                                           int stage) {
+    fImageIncrementVar = &state->addUniform(
+        GrGLShaderBuilder::kBoth_VariableLifetime,
+        kVec2f_GrSLType, "uImageIncrement", stage);
+    fKernelVar = &state->addUniform(
+        GrGLShaderBuilder::kFragment_VariableLifetime,
+        kFloat_GrSLType, "uKernel", stage, fKernelWidth);
 
     fImageIncrementLocation = kUseUniform;
-}
-
-void GrGLConvolutionEffect::setupFSUnis(VarArray* fsUnis,
-                                        int stage) {
-    fKernelVar = &fsUnis->push_back();
-    fKernelVar->setType(kFloat_GrSLType);
-    fKernelVar->setTypeModifier(
-        GrGLShaderVar::kUniform_TypeModifier);
-    fKernelVar->setArrayCount(fKernelWidth);
-    (*fKernelVar->accessName()) = "uKernel";
-    fKernelVar->accessName()->appendS32(stage);
-
     fKernelLocation = kUseUniform;
-
-    // Image increment is used in both vertex & fragment shaders.
-    fsUnis->push_back(*fImageIncrementVar).setEmitPrecision(false);
 }
 
 void GrGLConvolutionEffect::emitVS(GrGLShaderBuilder* state,
diff --git a/src/gpu/gl/GrGLProgram.cpp b/src/gpu/gl/GrGLProgram.cpp
index d752f1f..9a78a6e 100644
--- a/src/gpu/gl/GrGLProgram.cpp
+++ b/src/gpu/gl/GrGLProgram.cpp
@@ -309,7 +309,7 @@
                                   GrGLShaderBuilder* segments) const {
     if (layout & GrDrawTarget::kEdge_VertexLayoutBit) {
         const char *vsName, *fsName;
-        segments->appendVarying(kVec4f_GrSLType, "Edge", &vsName, &fsName);
+        segments->addVarying(kVec4f_GrSLType, "Edge", &vsName, &fsName);
         segments->fVSAttrs.push_back().set(kVec4f_GrSLType,
             GrGLShaderVar::kAttribute_TypeModifier, EDGE_ATTR_NAME);
         segments->fVSCode.appendf("\t%s = " EDGE_ATTR_NAME ";\n", vsName);
@@ -379,7 +379,7 @@
                 GrGLShaderVar::kAttribute_TypeModifier,
                 COL_ATTR_NAME);
             const char *vsName, *fsName;
-            segments->appendVarying(kVec4f_GrSLType, "Color", &vsName, &fsName);
+            segments->addVarying(kVec4f_GrSLType, "Color", &vsName, &fsName);
             segments->fVSCode.appendf("\t%s = " COL_ATTR_NAME ";\n", vsName);
             *inColor = fsName;
             } break;
@@ -406,7 +406,7 @@
                                        GrGLShaderVar::kAttribute_TypeModifier,
                                        COV_ATTR_NAME);
     const char *vsName, *fsName;
-    segments->appendVarying(kVec4f_GrSLType, "Coverage", &vsName, &fsName);
+    segments->addVarying(kVec4f_GrSLType, "Coverage", &vsName, &fsName);
     segments->fVSCode.appendf("\t%s = " COV_ATTR_NAME ";\n", vsName);
     if (inOutCoverage->size()) {
         segments->fFSCode.appendf("\tvec4 attrCoverage = %s * %s;\n",
@@ -1256,11 +1256,11 @@
     // part of the quadratic as a varying.
     if (segments->fVaryingDims == segments->fCoordDims) {
         GrAssert(2 == segments->fCoordDims);
-        segments->appendVarying(kFloat_GrSLType,
-                                "Radial2BCoeff",
-                                stageNum,
-                                radial2VaryingVSName,
-                                radial2VaryingFSName);
+        segments->addVarying(kFloat_GrSLType,
+                             "Radial2BCoeff",
+                             stageNum,
+                             radial2VaryingVSName,
+                             radial2VaryingFSName);
 
         GrStringBuilder radial2p2;
         GrStringBuilder radial2p3;
@@ -1486,12 +1486,12 @@
     GrAssert((desc.fInConfigFlags & StageDesc::kInConfigBitMask) ==
              desc.fInConfigFlags);
 
-    /// Vertex Shader Stuff
-
     if (NULL != customStage) {
-        customStage->setupVSUnis(&segments->fVSUnis, stageNum);
+        customStage->setupVariables(segments, stageNum);
     }
 
+    /// Vertex Shader Stuff
+
     // decide whether we need a matrix to transform texture coords
     // and whether the varying needs a perspective coord.
     const char* matName = NULL;
@@ -1532,11 +1532,11 @@
     }
 
     const char *varyingVSName, *varyingFSName;
-    segments->appendVarying(GrSLFloatVectorType(segments->fVaryingDims),
-                            "Stage",
-                           stageNum,
-                           &varyingVSName,
-                           &varyingFSName);
+    segments->addVarying(GrSLFloatVectorType(segments->fVaryingDims),
+                         "Stage",
+                        stageNum,
+                        &varyingVSName,
+                        &varyingFSName);
 
     if (!matName) {
         GrAssert(segments->fVaryingDims == segments->fCoordDims);
@@ -1577,10 +1577,6 @@
 
     /// Fragment Shader Stuff
 
-    if (NULL != customStage) {
-        customStage->setupFSUnis(&segments->fFSUnis, stageNum);
-    }
-
     // Function used to access the shader, may be made projective.
     GrStringBuilder texFunc("texture2D");
     if (desc.fOptFlags & (StageDesc::kIdentityMatrix_OptFlagBit |
diff --git a/src/gpu/gl/GrGLProgramStage.cpp b/src/gpu/gl/GrGLProgramStage.cpp
index 96c6e55..70d1186 100644
--- a/src/gpu/gl/GrGLProgramStage.cpp
+++ b/src/gpu/gl/GrGLProgramStage.cpp
@@ -17,15 +17,7 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
-void GrGLProgramStage::setupVSUnis(VarArray* vsUnis, int stage) {
-
-}
-
-void GrGLProgramStage::setupFSUnis(VarArray* fsUnis, int stage) {
-
-}
-
-void GrGLProgramStage::setupVaryings(GrGLShaderBuilder* state, int stage) {
+void GrGLProgramStage::setupVariables(GrGLShaderBuilder* state, int stage) {
 
 }
 
diff --git a/src/gpu/gl/GrGLProgramStage.h b/src/gpu/gl/GrGLProgramStage.h
index 0d2d660..52d7200 100644
--- a/src/gpu/gl/GrGLProgramStage.h
+++ b/src/gpu/gl/GrGLProgramStage.h
@@ -43,22 +43,8 @@
 
     virtual ~GrGLProgramStage();
 
-    /** Creates any uniform variables the vertex shader requires
-        and appends them to vsUnis;
-        must guarantee they are unique (typically done by
-        appending the stage number). */
-    virtual void setupVSUnis(VarArray* vsUnis, int stage);
-
-    /** Creates any uniform variables the fragment shader requires
-        and appends them to fsUnis;
-        must guarantee they are unique (typically done by
-        appending the stage number). */
-    virtual void setupFSUnis(VarArray* fsUnis, int stage);
-
-    /** Creates any varying variables shared between the shaders;
-        must guarantee they are unique (typically done by
-        appending the stage number). */
-    virtual void setupVaryings(GrGLShaderBuilder* state, int stage);
+    /** Create any uniforms or varyings the vertex shader requires. */
+    virtual void setupVariables(GrGLShaderBuilder* state, int stage);
 
     /** Appends vertex code to the appropriate GrStringBuilder
         on the state.
diff --git a/src/gpu/gl/GrGLShaderBuilder.cpp b/src/gpu/gl/GrGLShaderBuilder.cpp
index 36ace11..e0e8622 100644
--- a/src/gpu/gl/GrGLShaderBuilder.cpp
+++ b/src/gpu/gl/GrGLShaderBuilder.cpp
@@ -39,55 +39,6 @@
 
 }
 
-void GrGLShaderBuilder::appendVarying(GrSLType type,
-                                      const char* name,
-                                      const char** vsOutName,
-                                      const char** fsInName) {
-    fVSOutputs.push_back();
-    fVSOutputs.back().setType(type);
-    fVSOutputs.back().setTypeModifier(GrGLShaderVar::kOut_TypeModifier);
-    fVSOutputs.back().accessName()->printf("v%s", name);
-    if (vsOutName) {
-        *vsOutName = fVSOutputs.back().getName().c_str();
-    }
-    // input to FS comes either from VS or GS
-    const GrStringBuilder* fsName;
-    if (fUsesGS) {
-        // if we have a GS take each varying in as an array
-        // and output as non-array.
-        fGSInputs.push_back();
-        fGSInputs.back().setType(type);
-        fGSInputs.back().setTypeModifier(GrGLShaderVar::kIn_TypeModifier);
-        fGSInputs.back().setUnsizedArray();
-        *fGSInputs.back().accessName() = fVSOutputs.back().getName();
-        fGSOutputs.push_back();
-        fGSOutputs.back().setType(type);
-        fGSOutputs.back().setTypeModifier(GrGLShaderVar::kOut_TypeModifier);
-        fGSOutputs.back().accessName()->printf("g%s", name);
-        fsName = fGSOutputs.back().accessName();
-    } else {
-        fsName = fVSOutputs.back().accessName();
-    }
-    fFSInputs.push_back();
-    fFSInputs.back().setType(type);
-    fFSInputs.back().setTypeModifier(GrGLShaderVar::kIn_TypeModifier);
-    fFSInputs.back().setName(*fsName);
-    if (fsInName) {
-        *fsInName = fsName->c_str();
-    }
-}
-
-
-void GrGLShaderBuilder::appendVarying(GrSLType type,
-                                      const char* name,
-                                      int stageNum,
-                                      const char** vsOutName,
-                                      const char** fsInName) {
-    GrStringBuilder nameWithStage(name);
-    nameWithStage.appendS32(stageNum);
-    this->appendVarying(type, nameWithStage.c_str(), vsOutName, fsInName);
-}
-
 void GrGLShaderBuilder::computeSwizzle(uint32_t configFlags) {
    static const uint32_t kMulByAlphaMask =
         (GrGLProgram::StageDesc::kMulRGBByAlpha_RoundUp_InConfigFlag |
@@ -205,3 +156,53 @@
 
     return *var;
 }
+
+void GrGLShaderBuilder::addVarying(GrSLType type,
+                                   const char* name,
+                                   const char** vsOutName,
+                                   const char** fsInName) {
+    fVSOutputs.push_back();
+    fVSOutputs.back().setType(type);
+    fVSOutputs.back().setTypeModifier(GrGLShaderVar::kOut_TypeModifier);
+    fVSOutputs.back().accessName()->printf("v%s", name);
+    if (vsOutName) {
+        *vsOutName = fVSOutputs.back().getName().c_str();
+    }
+    // input to FS comes either from VS or GS
+    const GrStringBuilder* fsName;
+    if (fUsesGS) {
+        // if we have a GS take each varying in as an array
+        // and output as non-array.
+        fGSInputs.push_back();
+        fGSInputs.back().setType(type);
+        fGSInputs.back().setTypeModifier(GrGLShaderVar::kIn_TypeModifier);
+        fGSInputs.back().setUnsizedArray();
+        *fGSInputs.back().accessName() = fVSOutputs.back().getName();
+        fGSOutputs.push_back();
+        fGSOutputs.back().setType(type);
+        fGSOutputs.back().setTypeModifier(GrGLShaderVar::kOut_TypeModifier);
+        fGSOutputs.back().accessName()->printf("g%s", name);
+        fsName = fGSOutputs.back().accessName();
+    } else {
+        fsName = fVSOutputs.back().accessName();
+    }
+    fFSInputs.push_back();
+    fFSInputs.back().setType(type);
+    fFSInputs.back().setTypeModifier(GrGLShaderVar::kIn_TypeModifier);
+    fFSInputs.back().setName(*fsName);
+    if (fsInName) {
+        *fsInName = fsName->c_str();
+    }
+}
+
+
+void GrGLShaderBuilder::addVarying(GrSLType type,
+                                   const char* name,
+                                   int stageNum,
+                                   const char** vsOutName,
+                                   const char** fsInName) {
+    GrStringBuilder nameWithStage(name);
+    nameWithStage.appendS32(stageNum);
+    this->addVarying(type, nameWithStage.c_str(), vsOutName, fsInName);
+}
+
diff --git a/src/gpu/gl/GrGLShaderBuilder.h b/src/gpu/gl/GrGLShaderBuilder.h
index 79cccc7..1192637 100644
--- a/src/gpu/gl/GrGLShaderBuilder.h
+++ b/src/gpu/gl/GrGLShaderBuilder.h
@@ -26,17 +26,6 @@
 
     GrGLShaderBuilder();
 
-    void appendVarying(GrSLType type,
-                       const char* name,
-                       const char** vsOutName = NULL,
-                       const char** fsInName = NULL);
-
-    void appendVarying(GrSLType type,
-                       const char* name,
-                       int stageNum,
-                       const char** vsOutName = NULL,
-                       const char** fsInName = NULL);
-
     void computeSwizzle(uint32_t configFlags);
     void computeModulate(const char* fsInColor);
 
@@ -73,6 +62,26 @@
         int stageNum = -1,
         int count = GrGLShaderVar::kNonArray);
 
+    /** Add a varying variable to the current program to pass
+        values between vertex and fragment shaders.
+        If the last two parameters are non-NULL, they are filled
+        in with the name generated. */
+    void addVarying(GrSLType type,
+                    const char* name,
+                    const char** vsOutName = NULL,
+                    const char** fsInName = NULL);
+
+    /** Add a varying variable to the current program to pass
+        values between vertex and fragment shaders;
+        stageNum is appended to the name to guarantee uniqueness.
+        If the last two parameters are non-NULL, they are filled
+        in with the name generated. */
+    void addVarying(GrSLType type,
+                    const char* name,
+                    int stageNum,
+                    const char** vsOutName = NULL,
+                    const char** fsInName = NULL);
+
     // TODO: needs a better name
     enum SamplerMode {
         kDefault_SamplerMode,