cc: Replace recorded region with direct map lookup

cc/layers/picture_layer.cc

 // Copyright 2012 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/picture_layer.h"
 
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "ui/gfx/rect_conversions.h"
@@ skipping 25 matching lines @@
 
 void PictureLayer::PushPropertiesTo(LayerImpl* base_layer) {
   Layer::PushPropertiesTo(base_layer);
   PictureLayerImpl* layer_impl = static_cast<PictureLayerImpl*>(base_layer);
 
   if (layer_impl->bounds().IsEmpty()) {
     // Update may not get called for an empty layer, so resize here instead.
     // Using layer_impl because either bounds() or paint_properties().bounds
     // may disagree and either one could have been pushed to layer_impl.
     pile_->Resize(gfx::Size());
-    pile_->UpdateRecordedRegion();
   } else if (update_source_frame_number_ ==
              layer_tree_host()->source_frame_number()) {
     // If update called, then pile size must match bounds pushed to impl layer.
     DCHECK_EQ(layer_impl->bounds().ToString(), pile_->size().ToString());
   }
 
   layer_impl->SetIsMask(is_mask_);
   layer_impl->SetHasGpuRasterizationHint(has_gpu_rasterization_hint_);
 
   // Unlike other properties, invalidation must always be set on layer_impl.
@@ skipping 107 matching lines @@
   client_->PaintContents(canvas, gfx::Rect(width, height), &opaque);
   picture->endRecording();
   return picture;
 }
 
 void PictureLayer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc