cc: Avoid redraw for missing tile outside visible rect

cc/test/fake_picture_layer_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TEST_FAKE_PICTURE_LAYER_IMPL_H_
 #define CC_TEST_FAKE_PICTURE_LAYER_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/layers/picture_layer_impl.h"
 
@@ skipping 40 matching lines @@
     has_valid_tile_priorities_ = has_valid_priorities;
     use_set_valid_tile_priorities_flag_ = true;
   }
 
   using PictureLayerImpl::AddTiling;
   using PictureLayerImpl::CleanUpTilingsOnActiveLayer;
   using PictureLayerImpl::CanHaveTilings;
   using PictureLayerImpl::MarkVisibleResourcesAsRequired;
   using PictureLayerImpl::DoPostCommitInitializationIfNeeded;
   using PictureLayerImpl::MinimumContentsScale;
+  using PictureLayerImpl::GetViewportForTilePriorityInContentSpace;
   using PictureLayerImpl::SanityCheckTilingState;
 
   using PictureLayerImpl::UpdateIdealScales;
   using PictureLayerImpl::MaximumTilingContentsScale;
 
   void SetNeedsPostCommitInitialization() {
     needs_post_commit_initialization_ = true;
   }
 
   bool needs_post_commit_initialization() const {
@@ skipping 51 matching lines @@
 
   size_t append_quads_count_;
   size_t did_become_active_call_count_;
   bool has_valid_tile_priorities_;
   bool use_set_valid_tile_priorities_flag_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PICTURE_LAYER_IMPL_H_