cc: Clear the invalidation history when moving between compositors.

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 "base/auto_reset.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/resources/display_list_recording_source.h"
@@ skipping 71 matching lines @@
   if (host) {
     if (!recording_source_) {
       if (host->settings().use_display_lists) {
         recording_source_.reset(new DisplayListRecordingSource);
       } else {
         recording_source_.reset(
             new PicturePile(host->settings().minimum_contents_scale,
                             host->settings().default_tile_grid_size));
       }
     }
+    recording_source_->DidMoveToNewCompositor();
     recording_source_->SetSlowdownRasterScaleFactor(
         host->debug_state().slow_down_raster_scale_factor);
   }
 }
 
 void PictureLayer::SetNeedsDisplayRect(const gfx::Rect& layer_rect) {
   if (!layer_rect.IsEmpty()) {
     // Clamp invalidation to the layer bounds.
     pending_invalidation_.Union(
         gfx::IntersectRects(layer_rect, gfx::Rect(bounds())));
@@ skipping 100 matching lines @@
 
 bool PictureLayer::HasDrawableContent() const {
   return client_ && Layer::HasDrawableContent();
 }
 
 void PictureLayer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc