Move ContextMenu show/hide state tracking to WebContents

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index a4177e92f2727a07ec85686f3b9117e056e31b3c..1af4c0b810232d38cc1e85b137e35caad69bf20f 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -256,6 +256,9 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // Notifies that a CompositorFrame was received from the renderer.
   virtual void DidReceiveCompositorFrame() {}
 
+  // Returns true if there is context menu shown on page.
+  virtual bool IsShowingContextMenuOnPage() const;
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };