cc: Glue LTHI and Scheduler changes for checker-imaging.

cc/playback/raster_source.cc

 // Copyright 2014 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/playback/raster_source.h"
 
 #include <stddef.h>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/base/math_util.h"
@@ skipping 229 matching lines @@
 
 void RasterSource::GetDiscardableImagesInRect(
     const gfx::Rect& layer_rect,
     float contents_scale,
     std::vector<DrawImage>* images) const {
   DCHECK_EQ(0u, images->size());
   display_list_->GetDiscardableImagesInRect(layer_rect, contents_scale, images);
 }
 
 gfx::Rect RasterSource::GetRectForImage(ImageId image_id) const {
+  if (!display_list_)
+    return gfx::Rect();
   return display_list_->GetRectForImage(image_id);
 }
 
 bool RasterSource::CoversRect(const gfx::Rect& layer_rect) const {
   if (size_.IsEmpty())
     return false;
   gfx::Rect bounded_rect = layer_rect;
   bounded_rect.Intersect(gfx::Rect(size_));
   return recorded_viewport_.Contains(bounded_rect);
 }
@@ skipping 44 matching lines @@
       use_image_hijack_canvas(true) {}
 
 RasterSource::PlaybackSettings::PlaybackSettings(const PlaybackSettings&) =
     default;
 
 RasterSource::PlaybackSettings::PlaybackSettings(PlaybackSettings&&) = default;
 
 RasterSource::PlaybackSettings::~PlaybackSettings() = default;
 
 }  // namespace cc