drive: Rewrite UpdateOpreation to access cache/metadata on the blocking pool

chrome/browser/chromeos/drive/file_system/update_operation_unittest.cc

 // Copyright 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.
 
 #include "chrome/browser/chromeos/drive/file_system/update_operation.h"
 
 #include "chrome/browser/chromeos/drive/file_system/operation_test_base.h"
 #include "chrome/browser/google_apis/fake_drive_service.h"
 #include "chrome/browser/google_apis/gdata_wapi_parser.h"
 #include "chrome/browser/google_apis/test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace drive {
 namespace file_system {
 
 class UpdateOperationTest : public OperationTestBase {
  protected:
   virtual void SetUp() OVERRIDE {
    OperationTestBase::SetUp();
-   operation_.reset(
-       new UpdateOperation(observer(), scheduler(), metadata(), cache()));
+   operation_.reset(new UpdateOperation(blocking_task_runner(),
+                                        observer(),
+                                        scheduler(),
+                                        metadata(),
+                                        cache()));
  }
 
  virtual void TearDown() OVERRIDE {
    operation_.reset();
    OperationTestBase::TearDown();
  }
 
  scoped_ptr<UpdateOperation> operation_;
 };
 
@@ skipping 72 matching lines @@
   operation_->UpdateFileByResourceId(
       "file:nonexistent_resource_id",
       DriveClientContext(USER_INITIATED),
       google_apis::test_util::CreateCopyResultCallback(&error));
   google_apis::test_util::RunBlockingPoolTask();
   EXPECT_EQ(FILE_ERROR_NOT_FOUND, error);
 }
 
 }  // namespace file_system
 }  // namespace drive