cc: Dedup IPCs to return resources to client

content/browser/frame_host/render_widget_host_view_child_frame.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/frame_host/render_widget_host_view_child_frame.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
@@ skipping 320 matching lines @@
   if (!frame_connector_)
     return;
   if ((event.type == blink::WebInputEvent::GestureScrollUpdate &&
        not_consumed) ||
       event.type == blink::WebInputEvent::GestureScrollEnd)
     frame_connector_->BubbleScrollEvent(event);
 }
 
 void RenderWidgetHostViewChildFrame::SurfaceDrawn(uint32_t output_surface_id,
                                                   cc::SurfaceDrawStatus drawn) {
-  cc::CompositorFrameAck ack;
   DCHECK_GT(ack_pending_count_, 0U);
-
-  if (!surface_returned_resources_.empty())
-    ack.resources.swap(surface_returned_resources_);
   if (host_) {
-    host_->Send(new ViewMsg_SwapCompositorFrameAck(host_->GetRoutingID(),
-                                                   output_surface_id, ack));
+    host_->Send(new ViewMsg_ReclaimCompositorResources(
+        host_->GetRoutingID(), output_surface_id, true /* is_swap_ack */,
+        surface_returned_resources_));
+    surface_returned_resources_.clear();
   }
   ack_pending_count_--;
 }
 
 void RenderWidgetHostViewChildFrame::OnSwapCompositorFrame(
     uint32_t output_surface_id,
     cc::CompositorFrame frame) {
   TRACE_EVENT0("content",
                "RenderWidgetHostViewChildFrame::OnSwapCompositorFrame");
 
@@ skipping 245 matching lines @@
   return false;
 }
 
 // cc::SurfaceFactoryClient implementation.
 void RenderWidgetHostViewChildFrame::ReturnResources(
     const cc::ReturnedResourceArray& resources) {
   if (resources.empty())
     return;
 
   if (!ack_pending_count_ && host_) {
-    cc::CompositorFrameAck ack;
-    std::copy(resources.begin(), resources.end(),
-              std::back_inserter(ack.resources));
     host_->Send(new ViewMsg_ReclaimCompositorResources(
-        host_->GetRoutingID(), last_output_surface_id_, ack));
+        host_->GetRoutingID(), last_output_surface_id_, true /* is_swap_ack */,
+        resources));
     return;
   }
 
   std::copy(resources.begin(), resources.end(),
             std::back_inserter(surface_returned_resources_));
 }
 
 void RenderWidgetHostViewChildFrame::SetBeginFrameSource(
     cc::BeginFrameSource* source) {
   if (begin_frame_source_ && observing_begin_frame_source_)
@@ skipping 48 matching lines @@
 
 bool RenderWidgetHostViewChildFrame::IsChildFrameForTesting() const {
   return true;
 }
 
 cc::SurfaceId RenderWidgetHostViewChildFrame::SurfaceIdForTesting() const {
   return surface_id_;
 };
 
 }  // namespace content