Fix sizing issues in the tab modal signin flow.

chrome/browser/ui/webui/signin/sync_confirmation_handler.h

 // Copyright 2015 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_WEBUI_SIGNIN_SYNC_CONFIRMATION_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SIGNIN_SYNC_CONFIRMATION_HANDLER_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 23 matching lines @@
   // Handles "confirm" message from the page. No arguments.
   // This message is sent when the user confirms that they want complete sign in
   // with default sync settings.
   virtual void HandleConfirm(const base::ListValue* args);
 
   // Handles "undo" message from the page. No arguments.
   // This message is sent when the user clicks "undo" on the sync confirmation
   // dialog, which aborts signin and prevents sync from starting.
   virtual void HandleUndo(const base::ListValue* args);
 
-  // Handles "initialized" message from the page. No arguments.
-  // This message is sent when the sync confirmation dialog is finished being
-  // initialized.
-  virtual void HandleInitialized(const base::ListValue* args);
-
   // Handles "goToSettings" message from the page. No arguments.
   // This message is sent when the user clicks on the "Settings" link in the
   // sync confirmation dialog, which completes sign in but takes the user to the
   // sync settings page for configuration before starting sync.
   virtual void HandleGoToSettings(const base::ListValue* args);
 
+  // Handles the web ui message sent when the html content is done being laid
+  // out and it's time to resize the native view hosting it to fit. |args| is
+  // a single integer value for the height the native view should resize to.
+  virtual void HandleInitializedWithSize(const base::ListValue* args);
+
   // Sets the profile picture shown in the dialog to the image at |url|.
   virtual void SetUserImageURL(const std::string& url);
 
   Browser* GetDesktopBrowser();
   void CloseModalSigninWindow(
       LoginUIService::SyncConfirmationUIClosedResults results);
 
   DISALLOW_COPY_AND_ASSIGN(SyncConfirmationHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_SYNC_CONFIRMATION_HANDLER_H_