Create GrGLSLVaryingHandler class for program building

src/gpu/effects/GrBitmapTextGeoProc.cpp

Index: src/gpu/effects/GrBitmapTextGeoProc.cpp
diff --git a/src/gpu/effects/GrBitmapTextGeoProc.cpp b/src/gpu/effects/GrBitmapTextGeoProc.cpp
index 28c6f0ffc482a5b3e84e9331bd059c699b528d87..594646256e58ff30db01d6e3e14fd4000965f161 100644
--- a/src/gpu/effects/GrBitmapTextGeoProc.cpp
+++ b/src/gpu/effects/GrBitmapTextGeoProc.cpp
@@ -12,6 +12,7 @@
 #include "glsl/GrGLSLGeometryProcessor.h"
 #include "glsl/GrGLSLProgramBuilder.h"
 #include "glsl/GrGLSLProgramDataManager.h"
+#include "glsl/GrGLSLVarying.h"
 #include "glsl/GrGLSLVertexShaderBuilder.h"
 
 class GrGLBitmapTextGeoProc : public GrGLSLGeometryProcessor {
@@ -23,9 +24,10 @@ public:
 
         GrGLSLGPBuilder* pb = args.fPB;
         GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder;
+        GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
 
         // emit attributes
-        vertBuilder->emitAttributes(cte);
+        varyingHandler->emitAttributes(cte);
 
         // compute numbers to be hardcoded to convert texture coordinates from int to float
         SkASSERT(cte.numTextures() == 1);
@@ -35,7 +37,7 @@ public:
         SkScalar recipHeight = 1.0f / atlas->height();
 
         GrGLSLVertToFrag v(kVec2f_GrSLType);
-        pb->addVarying("TextureCoords", &v);
+        varyingHandler->addVarying("TextureCoords", &v);
         vertBuilder->codeAppendf("%s = vec2(%.*f, %.*f) * %s;", v.vsOut(),
                                  GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipWidth,
                                  GR_SIGNIFICANT_POW2_DECIMAL_DIG, recipHeight,
@@ -45,7 +47,7 @@ public:
         // Setup pass through color
         if (!cte.colorIgnored()) {
             if (cte.hasVertexColor()) {
-                pb->addPassThroughAttribute(cte.inColor(), args.fOutputColor);
+                varyingHandler->addPassThroughAttribute(cte.inColor(), args.fOutputColor);
             } else {
                 this->setupUniformColor(pb, fragBuilder, args.fOutputColor, &fColorUniform);
             }
@@ -57,6 +59,7 @@ public:
         // emit transforms
         this->emitTransforms(args.fPB,
                              vertBuilder,
+                             varyingHandler,
                              gpArgs->fPositionVar,
                              cte.inPosition()->fName,
                              cte.localMatrix(),