Implement GetInitiateUpload{New,Existing}FileUrl on Drive API v2.

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"
@@ skipping 50 matching lines @@
   GURL GetChildrenUrl(const std::string& resource_id) const;
 
   // Returns a URL to remove a resource with |child_id| from a directory
   // with |folder_id|.
   // Note that we use the name "folder" for the parameter, in order to be
   // consistent with the drive API document:
   // https://developers.google.com/drive/v2/reference/children/delete
   GURL GetChildrenUrlForRemoval(const std::string& folder_id,
                                 const std::string& child_id) const;
 
+  // Returns a URL to initiate uploading a new file.
+  GURL GetInitiateUploadNewFileUrl() const;
+
+  // Returns a URL to initiate uploading an existing file specified by
+  // |resource_id|.
+  GURL GetInitiateUploadExistingFileUrl(const std::string& resource_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_