[extensions] Stop parsing webstore urls so much

extensions/common/extensions_client.h

 // Copyright 2013 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 EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_
 #define EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 88 matching lines @@
 
   // Records that a fatal error was caught and suppressed. It is expected that
   // embedders will only do so if ShouldSuppressFatalErrors at some point
   // returned true.
   virtual void RecordDidSuppressFatalError() = 0;
 
   // Returns the base webstore URL prefix.
   virtual std::string GetWebstoreBaseURL() const = 0;
 
   // Returns the URL to use for update manifest queries.
-  virtual std::string GetWebstoreUpdateURL() const = 0;
+  virtual const GURL& GetWebstoreUpdateURL() const = 0;
 
   // Returns a flag indicating whether or not a given URL is a valid
   // extension blacklist URL.
   virtual bool IsBlacklistUpdateURL(const GURL& url) const = 0;
 
   // Returns the set of file paths corresponding to any images within an
   // extension's contents that may be displayed directly within the browser UI
   // or WebUI, such as icons or theme images. This set of paths is used by the
   // extension unpacker to determine which assets should be transcoded safely
   // within the utility sandbox.
@@ skipping 15 matching lines @@
   // Return the extensions client.
   static ExtensionsClient* Get();
 
   // Initialize the extensions system with this extensions client.
   static void Set(ExtensionsClient* client);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_