More prep work in Gr for landing AA hairline renderer.

Review URL: http://codereview.appspot.com/4944045



git-svn-id: http://skia.googlecode.com/svn/trunk@2164 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrGpuGLShaders.cpp b/gpu/src/GrGpuGLShaders.cpp
index 11dc993..05b1e88 100644
--- a/gpu/src/GrGpuGLShaders.cpp
+++ b/gpu/src/GrGpuGLShaders.cpp
@@ -185,11 +185,11 @@
         pdesc.fFirstCoverageStage = idx;
 
         bool edgeAA = random.nextF() > .5f;
-        if (edgeAA) {
-            pdesc.fEdgeAANumEdges = random.nextF() * this->getMaxEdges() + 1;
-            pdesc.fEdgeAAConcave = random.nextF() > .5f;
-        } else {
-            pdesc.fEdgeAANumEdges = 0;
+        if (edgeAA) {

+            pdesc.fEdgeAANumEdges = random.nextF() * this->getMaxEdges() + 1;

+            pdesc.fEdgeAAConcave = random.nextF() > .5f;

+        } else {

+            pdesc.fEdgeAANumEdges = 0;

         }
 
         if (fDualSourceBlendingSupport) {
@@ -256,13 +256,16 @@
 GrGpuGLShaders::GrGpuGLShaders(const GrGLInterface* gl)
     : GrGpuGL(gl, get_binding_in_use(gl)) {
 
-    f4X4DownsampleFilterSupport = true;
+    fShaderSupport = true;
     if (kDesktop_GrGLBinding == this->glBinding()) {
         fDualSourceBlendingSupport =
                             fGLVersion >= 3.3f ||
                             this->hasExtension("GL_ARB_blend_func_extended");
+        fShaderDerivativeSupport = true;
     } else {
         fDualSourceBlendingSupport = false;
+        fShaderDerivativeSupport =
+                            this->hasExtension("GL_OES_standard_derivatives");
     }
 
     fProgramData = NULL;