cc: Remove SkSurface cache from Resource

cc/resources/gpu_rasterizer.cc

Index: cc/resources/gpu_rasterizer.cc
diff --git a/cc/resources/gpu_rasterizer.cc b/cc/resources/gpu_rasterizer.cc
index 6f9786d36e5e1494c75045ea804927e27f3b1432..1f47d15ab57a9bffd3ddde13d541f32fde1a8f09 100644
--- a/cc/resources/gpu_rasterizer.cc
+++ b/cc/resources/gpu_rasterizer.cc
@@ -121,7 +121,8 @@ void GpuRasterizer::AddToMultiPictureDraw(const Tile* tile,
   scoped_ptr<ResourceProvider::ScopedWriteLockGr> lock(
       new ResourceProvider::ScopedWriteLockGr(resource_provider_,
                                               resource->id()));
-  SkSurface* sk_surface = lock->GetSkSurface(
+
+  skia::RefPtr<SkSurface> sk_surface = lock->CreateSkSurface(
       use_distance_field_text, tile->raster_source()->CanUseLCDText());
 
   locks->push_back(lock.Pass());