Turn off computation of the interest rect in cc in synchronized paint mode.

ui/compositor/layer.cc

Index: ui/compositor/layer.cc
diff --git a/ui/compositor/layer.cc b/ui/compositor/layer.cc
index 36d56f26ebb6644e024eb215bca060aa7d2f67fd..82996500068d10edf0d288c8dd05763df8c26d8d 100644
--- a/ui/compositor/layer.cc
+++ b/ui/compositor/layer.cc
@@ -751,18 +751,17 @@ void Layer::RequestCopyOfOutput(scoped_ptr<cc::CopyOutputRequest> request) {
 }
 
 scoped_refptr<cc::DisplayItemList> Layer::PaintContentsToDisplayList(
-    const gfx::Rect& clip,
-    ContentLayerClient::PaintingControlSetting painting_control) {
+    ContentLayerClient::PaintingControlSetting painting_control,
+    gfx::Rect* recording_viewport) {
   TRACE_EVENT1("ui", "Layer::PaintContentsToDisplayList", "name", name_);
   gfx::Rect local_bounds(bounds().size());
   gfx::Rect invalidation(
       gfx::IntersectRects(damaged_region_.bounds(), local_bounds));
-  DCHECK(clip.Contains(invalidation));
   ClearDamagedRects();
   cc::DisplayItemListSettings settings;
   settings.use_cached_picture = false;
   scoped_refptr<cc::DisplayItemList> display_list =
-      cc::DisplayItemList::Create(clip, settings);
+      cc::DisplayItemList::Create(*recording_viewport, settings);
   if (delegate_) {
     delegate_->OnPaintLayer(
         PaintContext(display_list.get(), device_scale_factor_, invalidation));