WebView context menu cleanup.

chrome/browser/extensions/menu_manager.h

Index: chrome/browser/extensions/menu_manager.h
diff --git a/chrome/browser/extensions/menu_manager.h b/chrome/browser/extensions/menu_manager.h
index ab5471e21e60fd825622c6779379a7ba96412cf4..c243b2bb770502a8f33909b947a37a8bb5df3b64 100644
--- a/chrome/browser/extensions/menu_manager.h
+++ b/chrome/browser/extensions/menu_manager.h
@@ -44,17 +44,20 @@ class MenuItem {
   // A list of MenuItems.
   typedef std::vector<MenuItem*> List;
 
-  // Key used to identify which extension a menu item belongs to.
-  // A menu item can also belong to a <webview> inside an extension,
-  // only in that case |webview_instance_id| would be
-  // non-zero (i.e. != guestview::kInstanceIDNone).
+  // EnstensionKey is used to identify a menu item. If the menu item belongs to
+  // an extension, then |extension_id| will be non-empty. Alternatively, if the
+  // menu item belongs to a WebView, then |webview_embedder_process_id| and
+  // |webview_instance_id| will be non-zero.
+  // TODO(paulmeyer): This should be called something else, since it is not just
+  // associated with extensions.
   struct ExtensionKey {
     std::string extension_id;
+    int webview_embedder_process_id;
     int webview_instance_id;
 
     ExtensionKey();
-    ExtensionKey(const std::string& extension_id, int webview_instance_id);
     explicit ExtensionKey(const std::string& extension_id);
+    ExtensionKey(int webview_embedder_process_id, int webview_instance_id);
 
     bool operator==(const ExtensionKey& other) const;
     bool operator!=(const ExtensionKey& other) const;