Added support for multiple urls in the component updater.

chrome/browser/component_updater/update_response.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 CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_RESPONSE_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_RESPONSE_H_
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
@@ skipping 72 matching lines @@
       std::string browser_min_version;
       std::vector<Package> packages;
     };
 
     Result();
     ~Result();
 
     std::string extension_id;
 
     // The list of fallback urls, for full and diff updates respectively.
+    // These urls are base urls; they don't include the filename.
     std::vector<GURL> crx_urls;
     std::vector<GURL> crx_diffurls;
 
     Manifest manifest;
   };
 
   static const int kNoDaystart = -1;
   struct Results {
     Results();
     ~Results();
@@ skipping 22 matching lines @@
   // Adds parse error details to |errors_| string.
   void ParseError(const char* details, ...);
 
   DISALLOW_COPY_AND_ASSIGN(UpdateResponse);
 };
 
 }  // namespace component_updater
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_RESPONSE_H_