Report LatencyInfo through trace buffer

content/common/gpu/image_transport_surface.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/common/gpu/image_transport_surface.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 233 matching lines @@
 void PassThroughImageTransportSurface::SetLatencyInfo(
     const ui::LatencyInfo& latency_info) {
   latency_info_ = latency_info;
 }
 
 bool PassThroughImageTransportSurface::SwapBuffers() {
   // GetVsyncValues before SwapBuffers to work around Mali driver bug:
   // crbug.com/223558.
   SendVSyncUpdateIfAvailable();
   bool result = gfx::GLSurfaceAdapter::SwapBuffers();
-  latency_info_.swap_timestamp = base::TimeTicks::HighResNow();
+  latency_info_.AddLatencyNumber(
+      ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0);
 
   if (transport_) {
     DCHECK(!is_swap_buffers_pending_);
     is_swap_buffers_pending_ = true;
 
     // Round trip to the browser UI thread, for throttling, by sending a dummy
     // SwapBuffers message.
     GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params params;
     params.surface_handle = 0;
     params.latency_info = latency_info_;
     params.size = surface()->GetSize();
     helper_->SendAcceleratedSurfaceBuffersSwapped(params);
   } else {
     helper_->SendLatencyInfo(latency_info_);
   }
   return result;
 }
 
 bool PassThroughImageTransportSurface::PostSubBuffer(
     int x, int y, int width, int height) {
   SendVSyncUpdateIfAvailable();
   bool result = gfx::GLSurfaceAdapter::PostSubBuffer(x, y, width, height);
-  latency_info_.swap_timestamp = base::TimeTicks::HighResNow();
+  latency_info_.AddLatencyNumber(
+      ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0);
 
   if (transport_) {
     DCHECK(!is_swap_buffers_pending_);
     is_swap_buffers_pending_ = true;
 
     // Round trip to the browser UI thread, for throttling, by sending a dummy
     // PostSubBuffer message.
     GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params params;
     params.surface_handle = 0;
     params.latency_info = latency_info_;
@@ skipping 61 matching lines @@
 void PassThroughImageTransportSurface::SendVSyncUpdateIfAvailable() {
   gfx::VSyncProvider* vsync_provider = GetVSyncProvider();
   if (vsync_provider) {
     vsync_provider->GetVSyncParameters(
       base::Bind(&ImageTransportHelper::SendUpdateVSyncParameters,
                  helper_->AsWeakPtr()));
   }
 }
 
 }  // namespace content