Mac: Add context menu support (issue #293).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@286 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser_webview_mac.h

@@ -40,6 +40,9 @@ struct WebDropData;
 - (BOOL)isOpaque;
 - (void)setFrame:(NSRect)frameRect;
 
+// Called when a context menu item is selected by the user.
+- (void)menuItemSelected:(id)sender;
+
 // Register this WebView as a drag/drop target.
 - (void)registerDragDrop;