Refactor GrGpu path rendering functions to GrPathRendering

src/gpu/GrBatchFontCache.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBatchFontCache.h"
+#include "GrContext.h"
 #include "GrFontAtlasSizes.h"
 #include "GrGpu.h"
 #include "GrRectanizer.h"
 #include "GrSurfacePriv.h"
 #include "SkString.h"
 
 #include "SkDistanceFieldGen.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ skipping 216 matching lines @@
     }
 
     bool success = fBatchFontCache->addToAtlas(this, &glyph->fID, batchTarget, glyph->fMaskFormat,
                                                glyph->width(), glyph->height(),
                                                storage.get(), &glyph->fAtlasLocation);
     if (success) {
         fAtlasedGlyphs++;
     }
     return success;
 }