cc: Add ScopedReadLockGpuMemoryBuffer

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 86481a97da9b4ab23e3ceb789bcc0e2c0b0063de..36b9717deac619b6671d4cd64270be76f304e9ef 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -406,6 +406,11 @@ float FlipYFromRectToScreen(float y, float rect_height) {
 ////////////////////////////////////////////////////////////////////////////////
 // DelegatedFrameHost, public:
 
+int RenderWidgetHostViewMac::DelegatedFrameHostGetGpuMemoryBufferClientId()
+    const {
+  return render_widget_host_->GetProcess()->GetID();
+}
+
 ui::Layer* RenderWidgetHostViewMac::DelegatedFrameHostGetLayer() const {
   return root_layer_.get();
 }