Store recording invalidations in DisplayListRecordingSource, save them via Update.

cc/layers/picture_layer.h

 // 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.
 
 #ifndef CC_LAYERS_PICTURE_LAYER_H_
 #define CC_LAYERS_PICTURE_LAYER_H_
 
 #include "base/macros.h"
 #include "cc/base/invalidation_region.h"
 #include "cc/debug/devtools_instrumentation.h"
@@ skipping 50 matching lines @@
  private:
   friend class TestSerializationPictureLayer;
 
   void DropRecordingSourceContentIfInvalid();
 
   ContentLayerClient* client_;
   scoped_ptr<DisplayListRecordingSource> recording_source_;
   devtools_instrumentation::
       ScopedLayerObjectTracker instrumentation_object_tracker_;
 
-  // Invalidation to use the next time update is called.
-  InvalidationRegion invalidation_;
-
+  // These store the last visible layer and invalidation computed via a call
+  // to Update().
   gfx::Rect last_updated_visible_layer_rect_;
+  Region last_updated_invalidation_;
 
   int update_source_frame_number_;
   bool is_mask_;
   bool nearest_neighbor_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_H_