Remove --enablde-drive-v2-api flag.

chrome/browser/drive/drive_api_util.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_DRIVE_DRIVE_API_UTIL_H_
 #define CHROME_BROWSER_DRIVE_DRIVE_API_UTIL_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 20 matching lines @@
 class FileList;
 class FileResource;
 class InstalledApp;
 class ResourceEntry;
 class ResourceList;
 }  // namespace google_apis
 
 namespace drive {
 namespace util {
 
-// Returns true if Drive v2 API is enabled via commandline switch.
-bool IsDriveV2ApiEnabled();
-
 // Escapes ' to \' in the |str|. This is designed to use for string value of
 // search parameter on Drive API v2.
 // See also: https://developers.google.com/drive/search-parameters
 std::string EscapeQueryStringValue(const std::string& str);
 
 // Parses the query, and builds a search query for Drive API v2.
 // This only supports:
 //   Regular query (e.g. dog => fullText contains 'dog')
 //   Conjunctions
 //     (e.g. dog cat => fullText contains 'dog' and fullText contains 'cat')
@@ skipping 73 matching lines @@
 std::string GetMd5Digest(const base::FilePath& file_path);
 
 // The resource ID for the root directory for WAPI is defined in the spec:
 // https://developers.google.com/google-apps/documents-list/
 extern const char kWapiRootDirectoryResourceId[];
 
 }  // namespace util
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_DRIVE_DRIVE_API_UTIL_H_