[cc] Remove remaining_frames from BeginFrameAck.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 3eed18a686a989d488de4d6c367a5d9b7dc0eced..45aa1a69b468658390a50e3569a002ad0896db34 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -1878,9 +1878,8 @@ bool RenderWidgetHostImpl::OnSwapCompositorFrame(
         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")) {
@@ -1942,10 +1941,9 @@ void RenderWidgetHostImpl::OnBeginFrameDidNotSwap(
     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);