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

cc/layers/picture_layer.cc

Index: cc/layers/picture_layer.cc
diff --git a/cc/layers/picture_layer.cc b/cc/layers/picture_layer.cc
index 0b92ff4a9d8a432eecfe8b6fa7335a24a0ddcb4e..bea6b0094c113676d310946d836170231284b8d2 100644
--- a/cc/layers/picture_layer.cc
+++ b/cc/layers/picture_layer.cc
@@ -150,7 +150,8 @@ bool PictureLayer::Update() {
   DCHECK(client_);
   updated |= recording_source_->UpdateAndExpandInvalidation(
       client_, &recording_invalidation_, layer_size, update_rect,
-      update_source_frame_number_, DisplayListRecordingSource::RECORD_NORMALLY);
+      update_source_frame_number_, DisplayListRecordingSource::RECORD_NORMALLY,
+      layer_tree_host()->settings().blink_synchronized_painting_enabled);
   last_updated_visible_layer_rect_ = visible_layer_rect();
 
   if (updated) {
@@ -181,7 +182,8 @@ skia::RefPtr<SkPicture> PictureLayer::GetPicture() const {
   Region recording_invalidation;
   recording_source->UpdateAndExpandInvalidation(
       client_, &recording_invalidation, layer_size, gfx::Rect(layer_size),
-      update_source_frame_number_, DisplayListRecordingSource::RECORD_NORMALLY);
+      update_source_frame_number_, DisplayListRecordingSource::RECORD_NORMALLY,
+      layer_tree_host()->settings().blink_synchronized_painting_enabled);
 
   scoped_refptr<DisplayListRasterSource> raster_source =
       recording_source->CreateRasterSource(false);