Added MockPresentationClient to use in layout tests.

content/shell/renderer/layout_test/webkit_test_runner.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 CONTENT_SHELL_WEBKIT_TEST_RUNNER_H_
 #define CONTENT_SHELL_WEBKIT_TEST_RUNNER_H_
 
 #include <vector>
 
 #include "base/files/file_path.h"
@@ skipping 46 matching lines @@
                       const std::string& value) override;
   void SetGamepadProvider(scoped_ptr<RendererGamepadProvider>) override;
   void SetDeviceLightData(const double data) override;
   void SetDeviceMotionData(const blink::WebDeviceMotionData& data) override;
   void SetDeviceOrientationData(
       const blink::WebDeviceOrientationData& data) override;
   void SetScreenOrientation(
       const blink::WebScreenOrientationType& orientation) override;
   void ResetScreenOrientation() override;
   void DidChangeBatteryStatus(const blink::WebBatteryStatus& status) override;
+  void SetScreenAvailability(bool available) override;
   void PrintMessage(const std::string& message) override;
   void PostTask(WebTask* task) override;
   void PostDelayedTask(WebTask* task, long long ms) override;
   blink::WebString RegisterIsolatedFileSystem(
       const blink::WebVector<blink::WebString>& absolute_filenames) override;
   long long GetCurrentTimeInMillisecond() override;
   blink::WebString GetAbsoluteWebStringFromUTF8Path(
       const std::string& utf8_path) override;
   blink::WebURL LocalFileToDataURL(const blink::WebURL& file_url) override;
   blink::WebURL RewriteLayoutTestsURL(const std::string& utf8_url) override;
@@ skipping 80 matching lines @@
 
   scoped_ptr<LeakDetector> leak_detector_;
   bool needs_leak_detector_;
 
   DISALLOW_COPY_AND_ASSIGN(WebKitTestRunner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_WEBKIT_TEST_RUNNER_H_