Move VertexBuilder to a GrGLFullShaderBuilder subclass

src/gpu/gl/GrGLProgram.cpp

Index: src/gpu/gl/GrGLProgram.cpp
diff --git a/src/gpu/gl/GrGLProgram.cpp b/src/gpu/gl/GrGLProgram.cpp
index b8f2664b207c123ba5197860fb07e37637922e23..28c98f7008ad095a817cce6aa0dd08f426a494b2 100644
--- a/src/gpu/gl/GrGLProgram.cpp
+++ b/src/gpu/gl/GrGLProgram.cpp
@@ -211,12 +211,8 @@ bool GrGLProgram::genProgram(const GrEffectStage* colorStages[],
 
     const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
 
-    bool needsVertexShader = true;
-
-    GrGLShaderBuilder builder(fGpu, fUniformManager, fDesc, needsVertexShader);
-    if (GrGLShaderBuilder::VertexBuilder* vertexBuilder = builder.getVertexBuilder()) {
-        fUniformHandles.fViewMatrixUni = vertexBuilder->getViewMatrixUniform();
-    }
+    GrGLFullShaderBuilder builder(fGpu, fUniformManager, fDesc);
+    fUniformHandles.fViewMatrixUni = builder.getViewMatrixUniform();
 
     // incoming color to current stage being processed.
     SkString inColor = builder.getInputColor();