Route D3D VSync signal to Compositor

content/browser/compositor/gpu_browser_compositor_output_surface.cc

Index: content/browser/compositor/gpu_browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/gpu_browser_compositor_output_surface.cc b/content/browser/compositor/gpu_browser_compositor_output_surface.cc
index 8ad8384dbaf8e62208841f95deb10c877d651ceb..a09063fbc6f6cf3276d293e65d7ead9988c28483 100644
--- a/content/browser/compositor/gpu_browser_compositor_output_surface.cc
+++ b/content/browser/compositor/gpu_browser_compositor_output_surface.cc
@@ -42,6 +42,14 @@ GpuBrowserCompositorOutputSurface::~GpuBrowserCompositorOutputSurface() {
       UpdateVSyncParametersCallback());
 }
 
+void GpuBrowserCompositorOutputSurface::SetNeedsVSync(bool needs_vsync) {
+#if defined(OS_WIN)
+  GetCommandBufferProxy()->SetNeedsVSync(needs_vsync);
+#else
+  NOTREACHED();
+#endif  // defined(OS_WIN)
+}
+
 void GpuBrowserCompositorOutputSurface::OnGpuSwapBuffersCompleted(
     const std::vector<ui::LatencyInfo>& latency_info,
     gfx::SwapResult result,