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 486765d22fe487d88580c19e19737ba2fb752b0a..8a5ad52ea0e8da7795a3980e75ba3eb4d1176d10 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*>(