Remove separate cache for clip mask textures

tests/ResourceCacheTest.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 here to ensure SK_SUPPORT_GPU is set correctly before it is examined.
 #include "SkTypes.h"
 
 #if SK_SUPPORT_GPU
 
 #include "GrContext.h"
 #include "GrContextFactory.h"
 #include "GrGpu.h"
 #include "GrGpuResourceCacheAccess.h"
 #include "GrGpuResourcePriv.h"
 #include "GrRenderTarget.h"
 #include "GrRenderTargetPriv.h"
 #include "GrResourceCache.h"
+#include "GrResourceProvider.h"
 #include "GrTest.h"
 #include "SkCanvas.h"
 #include "SkGr.h"
 #include "SkMessageBus.h"
 #include "SkSurface.h"
 #include "Test.h"
 
 static const int gWidth = 640;
 static const int gHeight = 480;
 
@@ skipping 1288 matching lines @@
     test_cache_chained_purge(reporter);
     test_resource_size_changed(reporter);
     test_timestamp_wrap(reporter);
     test_flush(reporter);
     test_large_resource_count(reporter);
     test_custom_data(reporter);
     test_abandoned(reporter);
 }
 
 #endif