Add support for multi-line GlobalError messages to Views.

chrome/browser/extensions/extension_error_ui.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_ERROR_UI_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_UI_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/global_error/global_error.h"
@@ skipping 39 matching lines @@
   // synchronously.
   virtual void Close() = 0;
 
  protected:
   explicit ExtensionErrorUI(ExtensionService* extension_service);
 
   ExtensionService* extension_service() const { return extension_service_; }
 
   // Model methods for the bubble view.
   string16 GetBubbleViewTitle();
-  string16 GetBubbleViewMessage();
+  std::vector<string16> GetBubbleViewMessages();
   string16 GetBubbleViewAcceptButtonLabel();
   string16 GetBubbleViewCancelButtonLabel();
 
   // Sub-classes should call this methods based on the actions taken by the user
   // in the error bubble.
   void BubbleViewDidClose();  // destroys |this|
   void BubbleViewAcceptButtonPressed();
   void BubbleViewCancelButtonPressed();
 
  private:
   bool should_delete_self_on_close_;
   ExtensionService* extension_service_;
   scoped_ptr<extensions::ExtensionIdSet> external_extension_ids_;
   scoped_ptr<extensions::ExtensionIdSet> blacklisted_extension_ids_;
   string16 message_;  // Displayed in the body of the alert.
 
   // For a given set of extension IDs, generates appropriate text
   // describing what the user needs to know about them.
   string16 GenerateMessageSection(const extensions::ExtensionIdSet* extensions,
                                   int extension_template_message_id,
                                   int app_template_message_id);
 
   // Generates the message displayed in the body of the alert.
   string16 GenerateMessage();
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionErrorUI);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_UI_H_