Add base_url to DriveApiUrlGenerator.

chrome/browser/google_apis/drive_api_url_generator.h

 // Copyright (c) 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_GOOGLE_APIS_DRIVE_API_URL_GENERATOR_H_
 #define CHROME_BROWSER_GOOGLE_APIS_DRIVE_API_URL_GENERATOR_H_
 
 #include <string>
 
 #include "googleurl/src/gurl.h"
 
 namespace google_apis {
 
 // This class is used to generate URLs for communicating with drive api
 // servers for production, and a local server for testing.
 class DriveApiUrlGenerator {
  public:
-  // TODO(hidehiko): Pass server name to a constructor in order to inject
-  // server path for testing.
-  DriveApiUrlGenerator();
+  // |base_url| is the path to the target drive api server.
+  // Note that this is an injecting point for a testing server.
+  explicit DriveApiUrlGenerator(const GURL& base_url);
   ~DriveApiUrlGenerator();
 
+  // The base URL for communicating with the production drive api server.
+  static const char kBaseUrlForProduction[];
+
   // Returns a URL to fetch "about" data.
   GURL GetAboutUrl() const;
 
   // Returns a URL to fetch "applist" data.
   GURL GetApplistUrl() const;
 
   // Returns a URL to fetch a list of changes.
   // override_url:
   //   The base url for the fetch. If empty, the default url is used.
   // start_changestamp:
   //   The starting point of the requesting change list, or 0 if all changes
   //   are necessary.
   GURL GetChangelistUrl(
       const GURL& override_url, int64 start_changestamp) const;
 
   // Returns a URL to fetch a list of files with the given |search_string|.
   // override_url:
   //   The base url for the fetching. If empty, the default url is used.
   // search_string: The search query.
   GURL GetFilelistUrl(
       const GURL& override_url, const std::string& search_string) const;
 
   // Returns a URL to fecth a file content.
   GURL GetFileUrl(const std::string& file_id) const;
 
+ private:
+  const GURL base_url_;
+
   // This class is copyable hence no DISALLOW_COPY_AND_ASSIGN here.
 };
 
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_DRIVE_API_URL_GENERATOR_H_