Add latency info to input events sent to RenderWidget.

content/renderer/render_widget.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/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 658 matching lines @@
   if (!animation_update_pending_ && !paint_aggregator_.HasPendingUpdate()) {
     TRACE_EVENT0("renderer", "EarlyOut_NoPendingUpdate");
     return;
   }
 
   // Continue painting if necessary...
   DoDeferredUpdateAndSendInputAck();
 }
 
 void RenderWidget::OnHandleInputEvent(const WebKit::WebInputEvent* input_event,
+                                      const cc::LatencyInfo& latency_info,
                                       bool is_keyboard_shortcut) {
   TRACE_EVENT0("renderer", "RenderWidget::OnHandleInputEvent");
 
   handling_input_event_ = true;
   if (!input_event) {
     handling_input_event_ = false;
     return;
   }
 
+  if (compositor_)
+    compositor_->SetLatencyInfo(latency_info);
+
   base::TimeDelta now = base::TimeDelta::FromInternalValue(
       base::TimeTicks::Now().ToInternalValue());
 
   int64 delta = static_cast<int64>(
       (now.InSecondsF() - input_event->timeStampSeconds) *
           base::Time::kMicrosecondsPerSecond);
   UMA_HISTOGRAM_CUSTOM_COUNTS("Event.Latency.Renderer", delta, 0, 1000000, 100);
   std::string name_for_event =
       base::StringPrintf("Event.Latency.Renderer.%s",
                          GetEventName(input_event->type));
@@ skipping 1617 matching lines @@
 
   if (!context->Initialize(
           attributes,
           false /* bind generates resources */,
           CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE))
     return NULL;
   return context.release();
 }
 
 }  // namespace content