cc : Snap texture layers to pixel boundary

cc/layers/texture_layer.cc

 // Copyright 2010 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.
 
 #include "cc/layers/texture_layer.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
@@ skipping 183 matching lines @@
       updated = true;
     }
   }
 
   // SetTextureMailbox could be called externally and the same mailbox used for
   // different textures.  Such callers notify this layer that the texture has
   // changed by calling SetNeedsDisplay, so check for that here.
   return updated || !update_rect().IsEmpty();
 }
 
+bool TextureLayer::IsSnapped() {
+  return true;
+}
+
 void TextureLayer::PushPropertiesTo(LayerImpl* layer) {
   Layer::PushPropertiesTo(layer);
   TRACE_EVENT0("cc", "TextureLayer::PushPropertiesTo");
 
   TextureLayerImpl* texture_layer = static_cast<TextureLayerImpl*>(layer);
   texture_layer->SetFlipped(flipped_);
   texture_layer->SetNearestNeighbor(nearest_neighbor_);
   texture_layer->SetUVTopLeft(uv_top_left_);
   texture_layer->SetUVBottomRight(uv_bottom_right_);
   texture_layer->SetVertexOpacity(vertex_opacity_);
@@ skipping 79 matching lines @@
 void TextureLayer::TextureMailboxHolder::ReturnAndReleaseOnImplThread(
     const gpu::SyncToken& sync_token,
     bool is_lost,
     BlockingTaskRunner* main_thread_task_runner) {
   Return(sync_token, is_lost);
   main_thread_task_runner->PostTask(
       FROM_HERE, base::Bind(&TextureMailboxHolder::InternalRelease, this));
 }
 
 }  // namespace cc