Use Drive v2 API: enable behind --enable-drive-api flag

chrome/browser/chromeos/gdata/gdata_documents_service.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_CHROMEOS_GDATA_GDATA_DOCUMENTS_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_DOCUMENTS_SERVICE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 64 matching lines @@
     ~GetDocumentsOptions();
 
     int start_changestamp;
     std::string search_query;
     std::string directory_resource_id;
   };
 
   virtual ~DocumentsServiceInterface() {}
 
   // Initializes the documents service tied with |profile|.
-  virtual void Initialize(Profile* profile) = 0;
+  virtual void Initialize(Profile* profile, bool use_drive_api) = 0;
 
   // Retrieves the operation registry.
   virtual GDataOperationRegistry* operation_registry() const = 0;
 
   // Cancels all in-flight operations.
   virtual void CancelAll() = 0;
 
   // Authenticates the user by fetching the auth token as
   // needed. |callback| will be run with the error code and the auth
   // token, on the thread this function is run.
@@ skipping 104 matching lines @@
 // This class provides documents feed service calls.
 class DocumentsService : public DocumentsServiceInterface {
  public:
   // DocumentsService is usually owned and created by GDataFileSystem.
   DocumentsService();
   virtual ~DocumentsService();
 
   GDataAuthService* auth_service_for_testing();
 
   // DocumentsServiceInterface Overrides
-  virtual void Initialize(Profile* profile) OVERRIDE;
+  virtual void Initialize(Profile* profile, bool use_drive_api) OVERRIDE;
   virtual GDataOperationRegistry* operation_registry() const OVERRIDE;
   virtual void CancelAll() OVERRIDE;
   virtual void Authenticate(const AuthStatusCallback& callback) OVERRIDE;
   virtual void GetDocuments(const GURL& feed_url,
                             const GetDocumentsOptions& options,
                             const GetDataCallback& callback) OVERRIDE;
   virtual void GetDocumentEntry(const std::string& resource_id,
                                 const GetDataCallback& callback) OVERRIDE;
 
   virtual void GetAccountMetadata(const GetDataCallback& callback) OVERRIDE;
@@ skipping 34 matching lines @@
   virtual void ResumeUpload(const ResumeUploadParams& params,
                             const ResumeUploadCallback& callback) OVERRIDE;
   virtual void AuthorizeApp(const GURL& resource_url,
                             const std::string& app_id,
                             const GetDataCallback& callback) OVERRIDE;
  private:
   Profile* profile_;
 
   scoped_ptr<GDataOperationRunner> runner_;
 
+  // If true use Drive v2 API instead of Document List API.
+  bool use_drive_api_;
+
   DISALLOW_COPY_AND_ASSIGN(DocumentsService);
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_DOCUMENTS_SERVICE_H_