Introduce GrGLShaderBuilder::TextureSampler

Review URL: https://codereview.appspot.com/6495099/



git-svn-id: http://skia.googlecode.com/svn/trunk@5422 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/gradients/SkLinearGradient.cpp b/src/effects/gradients/SkLinearGradient.cpp
index 6415927..bcebc26 100644
--- a/src/effects/gradients/SkLinearGradient.cpp
+++ b/src/effects/gradients/SkLinearGradient.cpp
@@ -490,7 +490,7 @@
     virtual void emitFS(GrGLShaderBuilder* builder,
                         const char* outputColor,
                         const char* inputColor,
-                        const char* samplerName) SK_OVERRIDE;
+                        const TextureSamplerArray&) SK_OVERRIDE;
     static StageKey GenKey(const GrCustomStage& s, const GrGLCaps& caps) { return 0; }
 
 private:
@@ -550,10 +550,10 @@
 void GrGLLinearGradient::emitFS(GrGLShaderBuilder* builder,
                                 const char* outputColor,
                                 const char* inputColor,
-                                const char* samplerName) {
+                                const TextureSamplerArray& samplers) {
     SkString t;
     t.printf("%s.x", builder->defaultTexCoordsName());
-    this->emitColorLookup(builder, t.c_str(), outputColor, inputColor, samplerName);
+    this->emitColorLookup(builder, t.c_str(), outputColor, inputColor, samplers[0]);
 }
 
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