[cc] Remove BeginFrameAck from BFS::DidFinishFrame and update tests.

content/renderer/gpu/compositor_external_begin_frame_source.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/renderer/gpu/compositor_external_begin_frame_source.h"
 
 #include "content/common/view_messages.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ipc/ipc_sync_message_filter.h"
 
@@ skipping 38 matching lines @@
 
   external_begin_frame_source_.AddObserver(obs);
 }
 
 void CompositorExternalBeginFrameSource::RemoveObserver(
     cc::BeginFrameObserver* obs) {
   external_begin_frame_source_.RemoveObserver(obs);
 }
 
 void CompositorExternalBeginFrameSource::DidFinishFrame(
-    cc::BeginFrameObserver* obs,
-    const cc::BeginFrameAck& ack) {
-  external_begin_frame_source_.DidFinishFrame(obs, ack);
+    cc::BeginFrameObserver* obs) {
+  external_begin_frame_source_.DidFinishFrame(obs);
 }
 
 bool CompositorExternalBeginFrameSource::IsThrottled() const {
   return true;
 }
 
 void CompositorExternalBeginFrameSource::OnNeedsBeginFrames(
     bool needs_begin_frames) {
   Send(new ViewHostMsg_SetNeedsBeginFrames(routing_id_, needs_begin_frames));
 }
@@ skipping 17 matching lines @@
 void CompositorExternalBeginFrameSource::OnBeginFrame(
     const cc::BeginFrameArgs& args) {
   external_begin_frame_source_.OnBeginFrame(args);
 }
 
 bool CompositorExternalBeginFrameSource::Send(IPC::Message* message) {
   return message_sender_->Send(message);
 }
 
 }  // namespace content