Start to propagate constness of GrPipelineBuilder up the stack

src/gpu/GrTest.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTest.h"
 #include "GrContextOptions.h"
@@ skipping 148 matching lines @@
                           const GrPipeline&,
                           const GrBatchTracker&) const override {}
 
     void discard(GrRenderTarget*) override {}
 
     bool copySurface(GrSurface* dst,
                      GrSurface* src,
                      const SkIRect& srcRect,
                      const SkIPoint& dstPoint) override { return false; };
 
-    bool initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) override {
+    bool initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) const override {
         return false;
     }
 
     void xferBarrier(GrRenderTarget*, GrXferBarrierType) override {}
 
 private:
     void onResetContext(uint32_t resetBits) override {}
 
     GrTexture* onCreateTexture(const GrSurfaceDesc& desc, GrGpuResource::LifeCycle lifeCycle,
                                const void* srcData, size_t rowBytes) override {
@@ skipping 76 matching lines @@
     SkASSERT(NULL == fGpu);
     fGpu = SkNEW_ARGS(MockGpu, (this, options));
     SkASSERT(fGpu);
     this->initCommon();
 
     // We delete these because we want to test the cache starting with zero resources. Also, none of
     // these objects are required for any of tests that use this context. TODO: make stop allocating
     // resources in the buffer pools.
     fDrawingMgr.abandon();
 }