test_runner: Rename WebTestThemeEngineMac to MockWebThemeEngineMac.

content/shell/renderer/test_runner/WebTestThemeEngineMac.h

-// 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.
-
-// This implements the WebThemeEngine API in such a way that we match the Mac
-// port rendering more than usual Chromium path, thus allowing us to share
-// more pixel baselines.
-
-#ifndef CONTENT_SHELL_RENDERER_TEST_RUNNER_WEBTESTTHEMEENGINEMAC_H_
-#define CONTENT_SHELL_RENDERER_TEST_RUNNER_WEBTESTTHEMEENGINEMAC_H_
-
-#include "base/basictypes.h"
-#include "third_party/WebKit/public/platform/WebThemeEngine.h"
-
-namespace content {
-
-class WebTestThemeEngineMac : public blink::WebThemeEngine {
-public:
-    WebTestThemeEngineMac() { }
-    virtual ~WebTestThemeEngineMac() { }
-
-    virtual void paintScrollbarThumb(
-        blink::WebCanvas*,
-        blink::WebThemeEngine::State,
-        blink::WebThemeEngine::Size,
-        const blink::WebRect&,
-        const blink::WebThemeEngine::ScrollbarInfo&);
-
-private:
-    virtual void paintHIThemeScrollbarThumb(
-        blink::WebCanvas*,
-        blink::WebThemeEngine::State,
-        blink::WebThemeEngine::Size,
-        const blink::WebRect&,
-        const blink::WebThemeEngine::ScrollbarInfo&);
-    virtual void paintNSScrollerScrollbarThumb(
-        blink::WebCanvas*,
-        blink::WebThemeEngine::State,
-        blink::WebThemeEngine::Size,
-        const blink::WebRect&,
-        const blink::WebThemeEngine::ScrollbarInfo&);
-
-    DISALLOW_COPY_AND_ASSIGN(WebTestThemeEngineMac);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_WEBTESTTHEMEENGINEMAC_H_