SetNeedsRedraw directly when updating a visible tile.

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index 478ddeca1116ba7753dbf0cc90d8befeae246255..77fb58d602152199deec11450a0f324775bcfb1d 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -365,12 +365,6 @@ void SingleThreadProxy::SetNeedsRedrawRectOnImplThread(
   SetNeedsRedrawOnImplThread();
 }
 
-void SingleThreadProxy::DidInitializeVisibleTileOnImplThread() {
-  TRACE_EVENT0("cc", "SingleThreadProxy::DidInitializeVisibleTileOnImplThread");
-  if (scheduler_on_impl_thread_)
-    scheduler_on_impl_thread_->SetNeedsRedraw();
-}
-
 void SingleThreadProxy::SetNeedsCommitOnImplThread() {
   client_->ScheduleComposite();
   if (scheduler_on_impl_thread_)
@@ -749,11 +743,6 @@ void SingleThreadProxy::ScheduledActionAnimate() {
       layer_tree_host_impl_->CurrentBeginFrameArgs().frame_time);
 }
 
-void SingleThreadProxy::ScheduledActionUpdateVisibleTiles() {
-  DebugScopedSetImplThread impl(this);
-  layer_tree_host_impl_->UpdateVisibleTiles();
-}
-
 void SingleThreadProxy::ScheduledActionActivateSyncTree() {
   DebugScopedSetImplThread impl(this);
   layer_tree_host_impl_->ActivateSyncTree();