Send vsync timebase updates to the browser compositor

content/browser/gpu/gpu_process_host_ui_shim.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/gpu/gpu_process_host_ui_shim.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 185 matching lines @@
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceSuspend,
                         OnAcceleratedSurfaceSuspend)
     IPC_MESSAGE_HANDLER(GpuHostMsg_GraphicsInfoCollected,
                         OnGraphicsInfoCollected)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceNew,
                         OnAcceleratedSurfaceNew)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceRelease,
                         OnAcceleratedSurfaceRelease)
     IPC_MESSAGE_HANDLER(GpuHostMsg_VideoMemoryUsageStats,
                         OnVideoMemoryUsageStatsReceived);
+    IPC_MESSAGE_HANDLER(GpuHostMsg_UpdateVSyncParameters,
+                        OnUpdateVSyncParameters)
+
 #if defined(TOOLKIT_GTK) || defined(OS_WIN)
     IPC_MESSAGE_HANDLER(GpuHostMsg_ResizeView, OnResizeView)
 #endif
 
     IPC_MESSAGE_UNHANDLED_ERROR()
   IPC_END_MESSAGE_MAP()
 
   return true;
 }
 
+void GpuProcessHostUIShim::OnUpdateVSyncParameters(int surface_id,
+                                             base::TimeTicks timebase,
+                                             base::TimeDelta interval) {
+
+  int render_process_id = 0;
+  int render_widget_id = 0;
+  if (!GpuSurfaceTracker::Get()->GetRenderWidgetIDForSurface(
+      surface_id, &render_process_id, &render_widget_id)) {
+    return;
+  }
+  RenderProcessHost* host = RenderProcessHost::FromID(render_process_id);
+  if (!host)
+    return;
+  RenderWidgetHost* rwh = host->GetRenderWidgetHostByID(render_widget_id);
+  if (!rwh)
+    return;
+  RenderWidgetHostImpl::From(rwh)->UpdateVSyncParameters(timebase, interval);
+}
+
 void GpuProcessHostUIShim::OnLogMessage(
     int level,
     const std::string& header,
     const std::string& message) {
   GpuDataManagerImpl::GetInstance()->AddLogMessage(
       level, header, message);
 }
 
 void GpuProcessHostUIShim::OnGraphicsInfoCollected(const GPUInfo& gpu_info) {
   // OnGraphicsInfoCollected is sent back after the GPU process successfully
@@ skipping 133 matching lines @@
   view->AcceleratedSurfaceRelease(params.identifier);
 }
 
 void GpuProcessHostUIShim::OnVideoMemoryUsageStatsReceived(
     const GPUVideoMemoryUsageStats& video_memory_usage_stats) {
   GpuDataManagerImpl::GetInstance()->UpdateVideoMemoryUsageStats(
       video_memory_usage_stats);
 }
 
 }  // namespace content