Add a help bubble pointing to the omnibox when installing an extension with

chrome/browser/gtk/extension_installed_bubble_gtk.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_GTK_EXTENSION_INSTALLED_BUBBLE_GTK_H_
 #define CHROME_BROWSER_GTK_EXTENSION_INSTALLED_BUBBLE_GTK_H_
 #pragma once
 
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/gtk/custom_button.h"
 #include "chrome/browser/gtk/info_bubble_gtk.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 class Browser;
 class BrowserWindowGtk;
 class Extension;
 class SkBitmap;
 
 // Provides feedback to the user upon successful installation of an
 // extension. Depending on the type of extension, the InfoBubble will
 // point to:
+//    OMNIBOX_KEYWORD-> The omnibox.
 //    BROWSER_ACTION -> The browserAction icon in the toolbar.
 //    PAGE_ACTION    -> A preview of the page action icon in the location
 //                      bar which is shown while the InfoBubble is shown.
 //    GENERIC        -> The wrench menu. This case includes page actions that
 //                      don't specify a default icon.
 //
 // ExtensionInstallBubble manages its own lifetime.
 class ExtensionInstalledBubbleGtk
     : public InfoBubbleGtkDelegate,
       public NotificationObserver,
       public base::RefCountedThreadSafe<ExtensionInstalledBubbleGtk> {
  public:
   // The behavior and content of this InfoBubble comes in three varieties.
   enum BubbleType {
+    OMNIBOX_KEYWORD,
     BROWSER_ACTION,
     PAGE_ACTION,
     GENERIC
   };
 
   // Creates the ExtensionInstalledBubble and schedules it to be shown once
   // the extension has loaded. |extension| is the installed extension. |browser|
   // is the browser window which will host the bubble. |icon| is the install
   // icon of the extension.
   static void Show(const Extension* extension, Browser *browser, SkBitmap icon);
@@ skipping 37 matching lines @@
 
   // The 'x' that the user can press to hide the info bubble shelf.
   scoped_ptr<CustomDrawButton> close_button_;
 
   InfoBubbleGtk* info_bubble_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionInstalledBubbleGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_EXTENSION_INSTALLED_BUBBLE_GTK_H_