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

chrome/browser/chromeos/gdata/gdata_documents_service.cc

Index: chrome/browser/chromeos/gdata/gdata_documents_service.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_documents_service.cc b/chrome/browser/chromeos/gdata/gdata_documents_service.cc
index bf36b417cd12c27eccd54e2ba261e85fdf27d833..92c87648841efad405c1c1b65638282dd2c34d62 100644
--- a/chrome/browser/chromeos/gdata/gdata_documents_service.cc
+++ b/chrome/browser/chromeos/gdata/gdata_documents_service.cc
@@ -8,7 +8,6 @@
 
 #include "base/bind.h"
 #include "base/message_loop_proxy.h"
-#include "chrome/browser/chromeos/gdata/gdata_file_system.h"
 #include "chrome/browser/chromeos/gdata/gdata_operation_runner.h"
 #include "chrome/browser/chromeos/gdata/gdata_operations.h"
 #include "chrome/browser/profiles/profile.h"
@@ -71,7 +70,8 @@ DocumentsServiceInterface::GetDocumentsOptions::~GetDocumentsOptions() {}
 
 DocumentsService::DocumentsService()
     : profile_(NULL),
-      runner_(NULL) {
+      runner_(NULL),
+      use_drive_api_(false) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
@@ -83,8 +83,9 @@ GDataAuthService* DocumentsService::auth_service_for_testing() {
   return runner_->auth_service();
 }
 
-void DocumentsService::Initialize(Profile* profile) {
+void DocumentsService::Initialize(Profile* profile, bool use_drive_api) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  use_drive_api_ = use_drive_api;
   profile_ = profile;
   runner_.reset(new GDataOperationRunner(profile));
   runner_->Initialize();
@@ -139,7 +140,8 @@ void DocumentsService::GetAccountMetadata(const GetDataCallback& callback) {
   GetAccountMetadataOperation* operation =
       new GetAccountMetadataOperation(operation_registry(),
                                       profile_,
-                                      callback);
+                                      callback,
+                                      use_drive_api_);
   runner_->StartOperationWithRetry(operation);
 }