[cc] Remove remaining_frames from BeginFrameAck.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 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/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 
 #include <set>
 #include <tuple>
@@ skipping 1860 matching lines @@
   last_received_content_source_id_ = frame.metadata.content_source_id;
 
   if (frame.metadata.begin_frame_ack.sequence_number <
       cc::BeginFrameArgs::kStartingFrameNumber) {
     // Received an invalid ack, renderer misbehaved.
     bad_message::ReceivedBadMessage(
         GetProcess(),
         bad_message::RWH_INVALID_BEGIN_FRAME_ACK_COMPOSITOR_FRAME);
     return false;
   }
-  // |has_damage| and |remaining_frames| are not transmitted.
+  // |has_damage| is not transmitted.
   frame.metadata.begin_frame_ack.has_damage = true;
-  frame.metadata.begin_frame_ack.remaining_frames = 0;
 
   if (!ui::LatencyInfo::Verify(frame.metadata.latency_info,
                                "RenderWidgetHostImpl::OnSwapCompositorFrame")) {
     std::vector<ui::LatencyInfo>().swap(frame.metadata.latency_info);
   }
 
   latency_tracker_.OnSwapCompositorFrame(&frame.metadata.latency_info);
 
   bool is_mobile_optimized = IsMobileOptimizedFrame(frame.metadata);
   input_router_->NotifySiteIsMobileOptimized(is_mobile_optimized);
@@ skipping 41 matching lines @@
 
 void RenderWidgetHostImpl::OnBeginFrameDidNotSwap(
     const cc::BeginFrameAck& ack) {
   if (ack.sequence_number < cc::BeginFrameArgs::kStartingFrameNumber) {
     // Received an invalid ack, renderer misbehaved.
     bad_message::ReceivedBadMessage(
         GetProcess(), bad_message::RWH_INVALID_BEGIN_FRAME_ACK_DID_NOT_SWAP);
     return;
   }
 
-  // |has_damage| and |remaining_frames| are not transmitted.
+  // |has_damage| is not transmitted.
   cc::BeginFrameAck modified_ack = ack;
   modified_ack.has_damage = false;
-  modified_ack.remaining_frames = 0;
 
   if (view_)
     view_->OnBeginFrameDidNotSwap(modified_ack);
 }
 
 void RenderWidgetHostImpl::OnUpdateRect(
     const ViewHostMsg_UpdateRect_Params& params) {
   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
   TimeTicks paint_start = TimeTicks::Now();
 
@@ skipping 691 matching lines @@
 void RenderWidgetHostImpl::RequestCompositionUpdates(bool immediate_request,
                                                      bool monitor_updates) {
   if (!immediate_request && monitor_updates == monitoring_composition_info_)
     return;
   monitoring_composition_info_ = monitor_updates;
   Send(new InputMsg_RequestCompositionUpdates(routing_id_, immediate_request,
                                               monitor_updates));
 }
 
 }  // namespace content