Fold ScrollingCoordinatorChromium into ScrollingCoordinator and devirtualize

Source/WebCore/page/scrolling/ScrollingThread.h

Index: Source/WebCore/page/scrolling/ScrollingThread.h
diff --git a/Source/WebCore/page/scrolling/ScrollingThread.h b/Source/WebCore/page/scrolling/ScrollingThread.h
deleted file mode 100644
index 758182eb970e3e7aaa1d723655a17f7758ad0aa0..0000000000000000000000000000000000000000
--- a/Source/WebCore/page/scrolling/ScrollingThread.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * 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:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef ScrollingThread_h
-#define ScrollingThread_h
-
-#if ENABLE(THREADED_SCROLLING)
-
-#include <wtf/Functional.h>
-#include <wtf/Noncopyable.h>
-#include <wtf/Threading.h>
-#include <wtf/Vector.h>
-
-#if PLATFORM(MAC)
-#include <wtf/RetainPtr.h>
-#endif
-
-namespace WebCore {
-
-class ScrollingThread {
-    WTF_MAKE_NONCOPYABLE(ScrollingThread);
-
-public:
-    static bool isCurrentThread();
-    static void dispatch(const Function<void()>&);
-
-    // Will dispatch the given function on the main thread once all pending functions
-    // on the scrolling thread have finished executing. Used for synchronization purposes.
-    static void dispatchBarrier(const Function<void()>&);
-
-private:
-    ScrollingThread();
-
-    static ScrollingThread& shared();
-
-    void createThreadIfNeeded();
-    static void threadCallback(void* scrollingThread);
-    void threadBody();
-    void dispatchFunctionsFromScrollingThread();
-
-    void initializeRunLoop();
-    void wakeUpRunLoop();
-
-#if PLATFORM(MAC)
-    static void threadRunLoopSourceCallback(void* scrollingThread);
-    void threadRunLoopSourceCallback();
-#endif
-
-    ThreadIdentifier m_threadIdentifier;
-
-    ThreadCondition m_initializeRunLoopCondition;
-    Mutex m_initializeRunLoopConditionMutex;
-
-    Mutex m_functionsMutex;
-    Vector<Function<void()> > m_functions;
-
-#if PLATFORM(MAC)
-    // FIXME: We should use WebCore::RunLoop here.
-    RetainPtr<CFRunLoopRef> m_threadRunLoop;
-    RetainPtr<CFRunLoopSourceRef> m_threadRunLoopSource;
-#endif
-};
-
-} // namespace WebCore
-
-#endif // ENABLE(THREADED_SCROLLING)
-
-#endif // ScrollingThread_h