Stop painting when receiving delegated frame

content/browser/compositor/delegated_frame_host.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 "content/browser/compositor/delegated_frame_host.h"
 
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
@@ skipping 389 matching lines @@
       } else {
         frame_provider_->SetFrameData(frame_data.Pass());
       }
       modified_layers = true;
     }
   }
   released_front_lock_ = NULL;
   current_frame_size_in_dip_ = frame_size_in_dip;
   CheckResizeLock();
 
-  if (modified_layers) {
+  if (modified_layers && !damage_rect_in_dip.IsEmpty()) {
     // TODO(jbauman): Need to always tell the window observer about the
     // damage.
-    client_->SchedulePaintInRect(damage_rect_in_dip);
+    client_->GetLayer()->OnDelegatedFrameDamage(damage_rect_in_dip);
   }
 
   pending_delegated_ack_count_++;
 
   ui::Compositor* compositor = client_->GetCompositor();
   if (!compositor || !modified_layers) {
     SendDelegatedFrameAck(output_surface_id);
   } else {
     std::vector<ui::LatencyInfo>::const_iterator it;
     for (it = latency_info.begin(); it != latency_info.end(); ++it)
@@ skipping 502 matching lines @@
   if (frame_provider_.get()) {
     new_layer->SetShowDelegatedContent(frame_provider_.get(),
                                        current_frame_size_in_dip_);
   }
   if (!surface_id_.is_null()) {
     new_layer->SetShowSurface(surface_id_, current_frame_size_in_dip_);
   }
 }
 
 }  // namespace content