Make all quota-exceeding messages in the storage API explain what the failure

chrome/browser/extensions/api/web_request/web_request_api.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_API_WEB_REQUEST_WEB_REQUEST_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 419 matching lines @@
   DECLARE_EXTENSION_FUNCTION_NAME("webRequest.handlerBehaviorChanged");
 
  protected:
   virtual ~WebRequestHandlerBehaviorChanged() {}
 
   // ExtensionFunction:
   virtual void GetQuotaLimitHeuristics(
       QuotaLimitHeuristics* heuristics) const OVERRIDE;
   // Handle quota exceeded gracefully: Only warn the user but still execute the
   // function.
-  virtual void OnQuotaExceeded() OVERRIDE;
+  virtual void OnQuotaExceeded(const std::string& error) OVERRIDE;
   virtual bool RunImpl() OVERRIDE;
 };
 
 // Send updates to |host| with information about what webRequest-related
 // extensions are installed.
 // TODO(mpcomplete): remove. http://crbug.com/100411
 void SendExtensionWebRequestStatusToHost(content::RenderProcessHost* host);
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_H_