Name of primitive processor will now be printed in generated shader code

src/gpu/gl/builders/GrGLProgramBuilder.cpp

Index: src/gpu/gl/builders/GrGLProgramBuilder.cpp
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.cpp b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
index a07bd732af43d8ae0fc9e8e6e4850be8036fae36..bcad687224bbb6309a78147297478f2dfcefdfc9 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
@@ -268,6 +268,7 @@ void GrGLProgramBuilder::emitAndInstallProc(const GrPrimitiveProcessor& proc,
     SkString openBrace;
     openBrace.printf("{ // Stage %d, %s\n", fStageIndex, proc.name());
     fFS.codeAppend(openBrace.c_str());
+    fVS.codeAppendf("// Primitive Processor %s\n", proc.name());
 
     this->emitAndInstallProc(proc, outputColor->c_str(), outputCoverage->c_str());