cc: Make OutputSurface::BindToClient pure virtual and not return bool

content/browser/compositor/browser_compositor_output_surface.cc

Index: content/browser/compositor/browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/browser_compositor_output_surface.cc b/content/browser/compositor/browser_compositor_output_surface.cc
index 2a017bf77bd8ec25654c19441182005ede57aa7f..b93b865efe759fa4788091c0b7df3c096926a9b8 100644
--- a/content/browser/compositor/browser_compositor_output_surface.cc
+++ b/content/browser/compositor/browser_compositor_output_surface.cc
@@ -60,8 +60,6 @@ BrowserCompositorOutputSurface::~BrowserCompositorOutputSurface() {
 void BrowserCompositorOutputSurface::OnUpdateVSyncParametersFromGpu(
     base::TimeTicks timebase,
     base::TimeDelta interval) {
-  DCHECK(client_);  // BindToClient should have been called already.
-
   if (interval.is_zero()) {
     // TODO(brianderson): We should not be receiving 0 intervals.
     interval = cc::BeginFrameArgs::DefaultInterval();