Remove duplicated headers from the testing/ directory

Source/testing/runner/TestRunner.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2010 Pawel Hajdan (phajdan.jr@chromium.org)
  * Copyright (C) 2012 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 25 matching lines @@
 #include "MockWebSpeechRecognizer.h"
 #include "NotificationPresenter.h"
 #include "TestInterfaces.h"
 #include "WebPermissions.h"
 #include "public/platform/WebData.h"
 #include "public/platform/WebDeviceMotionData.h"
 #include "public/platform/WebDeviceOrientationData.h"
 #include "public/platform/WebPoint.h"
 #include "public/platform/WebURLResponse.h"
 #include "public/testing/WebPreferences.h"
-#include "public/testing/WebTask.h"
 #include "public/testing/WebTestDelegate.h"
 #include "public/testing/WebTestProxy.h"
 #include "public/web/WebBindings.h"
 #include "public/web/WebDataSource.h"
 #include "public/web/WebDocument.h"
 #include "public/web/WebElement.h"
 #include "public/web/WebFindOptions.h"
 #include "public/web/WebFrame.h"
 #include "public/web/WebGeolocationClientMock.h"
 #include "public/web/WebInputElement.h"
 #include "public/web/WebMIDIClientMock.h"
 #include "public/web/WebScriptSource.h"
 #include "public/web/WebSecurityPolicy.h"
 #include "public/web/WebSerializedScriptValue.h"
 #include "public/web/WebSettings.h"
 #include "public/web/WebSurroundingText.h"
 #include "public/web/WebView.h"
 #include "v8/include/v8.h"
 #include <limits>
-#include <memory>
 
 #if defined(__linux__) || defined(ANDROID)
 #include "public/web/linux/WebFontRendering.h"
 #endif
 
 using namespace blink;
 using namespace std;
 
 namespace WebTestRunner {
 
@@ skipping 2043 matching lines @@
     result->setNull();
 }
 
 void TestRunner::setPointerLockWillFailSynchronously(const CppArgumentList&, CppVariant* result)
 {
     m_pointerLockPlannedResult = PointerLockWillFailSync;
     result->setNull();
 }
 
 }