content: Remove Lock/Unlock CompositingSurface API from RWH.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 5e0d3028d7f540e1da6f549a0eff20597d97d4df..fc2c07a1839ab64a67da667105c34e6e603d28ee 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -2261,14 +2261,6 @@ void RenderWidgetHostViewAura::OnDidNavigateMainFrameToNewPage() {
   ui::GestureRecognizer::Get()->CancelActiveTouches(window_);
 }
 
-void RenderWidgetHostViewAura::LockCompositingSurface() {
-  NOTIMPLEMENTED();
-}
-
-void RenderWidgetHostViewAura::UnlockCompositingSurface() {
-  NOTIMPLEMENTED();
-}
-
 cc::FrameSinkId RenderWidgetHostViewAura::GetFrameSinkId() {
   return delegated_frame_host_ ? delegated_frame_host_->GetFrameSinkId()
                                : cc::FrameSinkId();