Allow GrGpuResources' unique keys to be changed.

src/effects/SkColorCubeFilter.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorCubeFilter.h"
 #include "SkColorPriv.h"
 #include "SkOnce.h"
@@ skipping 336 matching lines @@
 
     GrSurfaceDesc desc;
     desc.fWidth = fCache.cubeDimension();
     desc.fHeight = fCache.cubeDimension() * fCache.cubeDimension();
     desc.fConfig = kRGBA_8888_GrPixelConfig;
 
     SkAutoTUnref<GrTexture> textureCube(context->findAndRefCachedTexture(key));
     if (!textureCube) {
         textureCube.reset(context->createTexture(desc, true, fCubeData->data(), 0));
         if (textureCube) {
-            SkAssertResult(context->addResourceToCache(key, textureCube));
+            context->addResourceToCache(key, textureCube);
         }
     }
 
     return textureCube ? GrColorCubeEffect::Create(textureCube) : NULL;
 }
 #endif