content: Remove Lock/Unlock CompositingSurface API from RWH.

content/browser/frame_host/render_widget_host_view_guest.cc

Index: content/browser/frame_host/render_widget_host_view_guest.cc
diff --git a/content/browser/frame_host/render_widget_host_view_guest.cc b/content/browser/frame_host/render_widget_host_view_guest.cc
index 2b9f1e3ed1be83b5c73eeeaa12f313ad59e12d4d..93ea21f4b63ecb978654fe2d436e40d19dd67445 100644
--- a/content/browser/frame_host/render_widget_host_view_guest.cc
+++ b/content/browser/frame_host/render_widget_host_view_guest.cc
@@ -488,14 +488,6 @@ void RenderWidgetHostViewGuest::StopSpeaking() {
 }
 #endif  // defined(OS_MACOSX)
 
-void RenderWidgetHostViewGuest::LockCompositingSurface() {
-  NOTIMPLEMENTED();
-}
-
-void RenderWidgetHostViewGuest::UnlockCompositingSurface() {
-  NOTIMPLEMENTED();
-}
-
 RenderWidgetHostViewBase*
 RenderWidgetHostViewGuest::GetOwnerRenderWidgetHostView() const {
   return guest_ ? static_cast<RenderWidgetHostViewBase*>(