Refactor delegated scrolling in LayerImpl

content/browser/android/in_process/synchronous_compositor_impl.cc

Index: content/browser/android/in_process/synchronous_compositor_impl.cc
diff --git a/content/browser/android/in_process/synchronous_compositor_impl.cc b/content/browser/android/in_process/synchronous_compositor_impl.cc
index 44d686cb96c9c3435cfb042136a096f9d932376e..f42916ae34ef483d76ec6dd485c2e81d3f87147c 100644
--- a/content/browser/android/in_process/synchronous_compositor_impl.cc
+++ b/content/browser/android/in_process/synchronous_compositor_impl.cc
@@ -74,6 +74,7 @@ SynchronousCompositorImpl::SynchronousCompositorImpl(WebContents* contents)
       routing_id_(contents->GetRoutingID()),
       input_handler_(NULL),
       invoking_composite_(false),
+      block_updates_(false),
       weak_ptr_factory_(this) {
   DCHECK(contents);
   DCHECK_NE(routing_id_, MSG_ROUTING_NONE);
@@ -332,6 +333,10 @@ bool SynchronousCompositorImpl::IsExternalFlingActive() const {
   return false;
 }
 
+void SynchronousCompositorImpl::SetBlockUpdates(bool block_updates) {
+  block_updates_ = block_updates;
+}
+
 void SynchronousCompositorImpl::UpdateRootLayerState(
     const gfx::ScrollOffset& total_scroll_offset,
     const gfx::ScrollOffset& max_scroll_offset,