Add a learn more link to password generation bubble to point to a help page.

chrome/browser/ui/gtk/password_generation_bubble_gtk.h

 // Copyright (c) 2012 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_UI_GTK_PASSWORD_GENERATION_BUBBLE_GTK_H_
 #define CHROME_BROWSER_UI_GTK_PASSWORD_GENERATION_BUBBLE_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 16 matching lines @@
  public:
   PasswordGenerationBubbleGtk(const gfx::Rect& anchor_rect,
                               GtkWidget* anchor_widget,
                               Profile* profile,
                               content::RenderViewHost* render_view_host);
   virtual ~PasswordGenerationBubbleGtk();
 
  private:
   CHROMEGTK_CALLBACK_0(PasswordGenerationBubbleGtk, void, OnDestroy);
   CHROMEGTK_CALLBACK_0(PasswordGenerationBubbleGtk, void, OnAcceptClicked);
+  CHROMEG_CALLBACK_0(
+      PasswordGenerationBubbleGtk, void, OnLearnMoreLinkClicked, GtkButton*);
 
   BubbleGtk* bubble_;
   GtkWidget* text_field_;
+  Profile* profile_;
 
   // RenderViewHost associated with the button that spawned this bubble.
   content::RenderViewHost* render_view_host_;
 
   // Class that deals with generating passwords.
   autofill::PasswordGenerator password_generator_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordGenerationBubbleGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_PASSWORD_GENERATION_BUBBLE_GTK_H_