Add native permissions dialog for apps_devtools app.

chrome/browser/extensions/extension_install_prompt.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_EXTENSIONS_EXTENSION_INSTALL_PROMPT_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_PROMPT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 276 matching lines @@
                                   const extensions::Extension* extension,
                                   const IssueAdviceInfo& issue_advice);
 
   // This is called by the app handler launcher to review what permissions the
   // extension or app currently has.
   //
   // This *WILL* call Abort() on |delegate|.
   virtual void ReviewPermissions(Delegate* delegate,
                                  const extensions::Extension* extension);
 
+  virtual void PermissionsDialog(Delegate* delegate,

[asargent_no_longer_on_chrome, 2013/03/27 19:27:04]

nit: Please add a brief comment about what this does, if/how the Delegate can
expect to be called back, etc. Also, the ReviewPermissions function just above
this sounds pretty similar, so it might be helpful to mention the difference
between the two. 

Finally, a better name might include a verb, like "ShowPermissionsDialog" or
maybe "ConfirmPermissions" (to match the form of the Confirm* methods above)?

+                                 const extensions::Extension* extension);
+
   // Installation was successful. This is declared virtual for testing.
   virtual void OnInstallSuccess(const extensions::Extension* extension,
                                 SkBitmap* icon);
 
   // Installation failed. This is declared virtual for testing.
   virtual void OnInstallFailure(const extensions::CrxInstallerError& error);
 
  protected:
   friend class extensions::ExtensionWebstorePrivateApiTest;
   friend class extensions::MockGetAuthTokenFunction;
   friend class WebstoreStartupInstallUnpackFailureTest;
 
   // Whether or not we should record the oauth2 grant upon successful install.
   bool record_oauth2_grant_;
 
  private:
   friend class GalleryInstallApiTestObserver;
+  friend class ExtensionPermissionsPrompt;
 
   // Sets the icon that will be used in any UI. If |icon| is NULL, or contains
   // an empty bitmap, then a default icon will be used instead.
   void SetIcon(const SkBitmap* icon);
 
   // ImageLoader callback.
   void OnImageLoaded(const gfx::Image& image);
 
   // Starts the process of showing a confirmation UI, which is split into two.
   // 1) Set off a 'load icon' task.
@@ skipping 39 matching lines @@
   // A pre-filled prompt.
   Prompt prompt_;
 
   scoped_ptr<OAuth2MintTokenFlow> token_flow_;
 
   // Used to show the confirm dialog.
   ShowDialogCallback show_dialog_callback_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_PROMPT_H_