Add new latency_info for tracking browser composite time.

content/browser/renderer_host/compositor_impl_android.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/compositor_impl_android.h"
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
 
 #include "base/android/jni_android.h"
@@ skipping 48 matching lines @@
   OutputSurfaceWithoutParent(const scoped_refptr<
       content::ContextProviderCommandBuffer>& context_provider,
       base::WeakPtr<content::CompositorImpl> compositor_impl)
       : cc::OutputSurface(context_provider) {
     capabilities_.adjust_deadline_for_parent = false;
     compositor_impl_ = compositor_impl;
     main_thread_ = base::MessageLoopProxy::current();
   }
 
   virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE {
+    for (size_t i = 0; i < frame->metadata.latency_info.size(); i++) {
+      frame->metadata.latency_info[i].AddLatencyNumber(
+          ui::INPUT_EVENT_BROWSER_SWAP_BUFFER_COMPONENT, 0, 0);
+    }
+
     content::ContextProviderCommandBuffer* provider_command_buffer =
         static_cast<content::ContextProviderCommandBuffer*>(
             context_provider_.get());
     content::CommandBufferProxyImpl* command_buffer_proxy =
         provider_command_buffer->GetCommandBufferProxy();
     DCHECK(command_buffer_proxy);
     command_buffer_proxy->SetLatencyInfo(frame->metadata.latency_info);
 
     OutputSurface::SwapBuffers(frame);
   }
@@ skipping 603 matching lines @@
 }
 
 void CompositorImpl::SetNeedsAnimate() {
   if (!host_)
     return;
 
   host_->SetNeedsAnimate();
 }
 
 }  // namespace content