Move ContextMenu show/hide state tracking to WebContents

chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm

Index: chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
diff --git a/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm b/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
index b87d78040d2460ebf03ed3b330c4e203e06f01e1..3df8d85552d313494f91b661b2a763f6c76ecab3 100644
--- a/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
+++ b/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
@@ -74,8 +74,7 @@ void ChromeWebContentsViewDelegateMac::ShowMenu(
   // the second mouse event arrives. In this case, |ShowContextMenu()| will
   // get called multiple times - if so, don't create another context menu.
   // TODO(asvitkine): Fix the renderer so that it doesn't do this.
-  content::RenderWidgetHostView* widget_view = GetActiveRenderWidgetHostView();
-  if (widget_view && widget_view->IsShowingContextMenu())
+  if (web_contents_->IsShowingContextMenu())
     return;
 
   context_menu_->Show();