Revert of Add best-effort/allow rollback flags on WorkItem.

chrome/installer/util/work_item_mocks.h

 // Copyright 2016 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_INSTALLER_UTIL_WORK_ITEM_MOCKS_H_
 #define CHROME_INSTALLER_UTIL_WORK_ITEM_MOCKS_H_
 
 #include "base/macros.h"
 #include "chrome/installer/util/conditional_work_item_list.h"
 #include "chrome/installer/util/work_item.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 class MockWorkItem : public WorkItem {
  public:
   MockWorkItem();
   ~MockWorkItem();
 
-  MOCK_METHOD0(DoImpl, bool());
-  MOCK_METHOD0(RollbackImpl, void());
+  MOCK_METHOD0(Do, bool());
+  MOCK_METHOD0(Rollback, void());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockWorkItem);
 };
 
 class MockCondition : public WorkItem::Condition {
  public:
   MockCondition();
   ~MockCondition();
 
   MOCK_CONST_METHOD0(ShouldRun, bool());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockCondition);
 };
 
 using StrictMockWorkItem = testing::StrictMock<MockWorkItem>;
 using StrictMockCondition = testing::StrictMock<MockCondition>;
 
 #endif  // CHROME_INSTALLER_UTIL_WORK_ITEM_MOCKS_H_