cc: Push valid property values when CalcDrawProps skips layer.

cc/layers/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/layer.h"
 
 #include <algorithm>
 
 #include "base/location.h"
 #include "base/metrics/histogram.h"
@@ skipping 708 matching lines @@
     scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner,
     scoped_ptr<CopyOutputRequest> request,
     scoped_ptr<CopyOutputResult> result) {
   main_thread_task_runner->PostTask(FROM_HERE,
                                     base::Bind(&RunCopyCallbackOnMainThread,
                                                base::Passed(&request),
                                                base::Passed(&result)));
 }
 
 void Layer::PushPropertiesTo(LayerImpl* layer) {
+  // If we did not SavePaintProperties() for the layer this frame, then push the
+  // real property values, not the paint property values.
+  bool use_paint_properties = paint_properties_.source_frame_number ==
+                              layer_tree_host_->source_frame_number();
+
   layer->SetAnchorPoint(anchor_point_);
   layer->SetAnchorPointZ(anchor_point_z_);
   layer->SetBackgroundColor(background_color_);
-  layer->SetBounds(paint_properties_.bounds);
+  layer->SetBounds(use_paint_properties ? paint_properties_.bounds
+                                        : bounds_);
   layer->SetContentBounds(content_bounds());
   layer->SetContentsScale(contents_scale_x(), contents_scale_y());
   layer->SetDebugName(debug_name_);
   layer->SetCompositingReasons(compositing_reasons_);
   layer->SetDoubleSided(double_sided_);
   layer->SetDrawCheckerboardForMissingTiles(
       draw_checkerboard_for_missing_tiles_);
   layer->SetForceRenderSurface(force_render_surface_);
   layer->SetDrawsContent(DrawsContent());
   layer->SetHideLayerAndSubtree(hide_layer_and_subtree_);
@@ skipping 89 matching lines @@
 }
 
 bool Layer::DrawsContent() const {
   return is_drawable_;
 }
 
 void Layer::SavePaintProperties() {
   // TODO(reveman): Save all layer properties that we depend on not
   // changing until PushProperties() has been called. crbug.com/231016
   paint_properties_.bounds = bounds_;
+  paint_properties_.source_frame_number =
+      layer_tree_host_->source_frame_number();
 }
 
 bool Layer::Update(ResourceUpdateQueue* queue,
                    const OcclusionTracker* occlusion) {
+  DCHECK_EQ(layer_tree_host_->source_frame_number(),
+            paint_properties_.source_frame_number);
   return false;
 }
 
 bool Layer::NeedMoreUpdates() {
   return false;
 }
 
 void Layer::SetDebugName(const std::string& debug_name) {
   debug_name_ = debug_name;
   SetNeedsCommit();
@@ skipping 99 matching lines @@
 
 RenderingStatsInstrumentation* Layer::rendering_stats_instrumentation() const {
   return layer_tree_host_->rendering_stats_instrumentation();
 }
 
 bool Layer::SupportsLCDText() const {
   return false;
 }
 
 }  // namespace cc