Fold ScrollingCoordinatorChromium into ScrollingCoordinator and devirtualize

Source/WebCore/page/scrolling/ScrollingThread.cpp

Index: Source/WebCore/page/scrolling/ScrollingThread.cpp
diff --git a/Source/WebCore/page/scrolling/ScrollingThread.cpp b/Source/WebCore/page/scrolling/ScrollingThread.cpp
deleted file mode 100644
index 5d31edcab161836e23e007f313e60c9d7ee1aec6..0000000000000000000000000000000000000000
--- a/Source/WebCore/page/scrolling/ScrollingThread.cpp
+++ /dev/null
@@ -1,122 +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.
- */
-
-#include "config.h"
-#include "ScrollingThread.h"
-
-#if ENABLE(THREADED_SCROLLING)
-
-#include <wtf/MainThread.h>
-
-namespace WebCore {
-
-ScrollingThread::ScrollingThread()
-    : m_threadIdentifier(0)
-{
-}
-
-bool ScrollingThread::isCurrentThread()
-{
-    if (!shared().m_threadIdentifier)
-        return false;
-
-    return currentThread() == shared().m_threadIdentifier;
-}
-
-void ScrollingThread::dispatch(const Function<void()>& function)
-{
-    shared().createThreadIfNeeded();
-
-    {
-        MutexLocker locker(shared().m_functionsMutex);
-        shared().m_functions.append(function);
-    }
-
-    shared().wakeUpRunLoop();
-}
-
-static void callFunctionOnMainThread(const Function<void()>* function)
-{
-    callOnMainThread(*function);
-    delete function;
-}
-
-void ScrollingThread::dispatchBarrier(const Function<void()>& function)
-{
-    dispatch(bind(callFunctionOnMainThread, new Function<void()>(function)));
-}
-
-ScrollingThread& ScrollingThread::shared()
-{
-    DEFINE_STATIC_LOCAL(ScrollingThread, scrollingThread, ());
-    return scrollingThread;
-}
-
-void ScrollingThread::createThreadIfNeeded()
-{
-    if (m_threadIdentifier)
-        return;
-
-    // Wait for the thread to initialize the run loop.
-    {
-        MutexLocker locker(m_initializeRunLoopConditionMutex);
-
-        m_threadIdentifier = createThread(threadCallback, this, "WebCore: Scrolling");
-        
-#if PLATFORM(MAC)
-        while (!m_threadRunLoop)
-            m_initializeRunLoopCondition.wait(m_initializeRunLoopConditionMutex);
-#endif
-    }
-}
-
-void ScrollingThread::threadCallback(void* scrollingThread)
-{
-    static_cast<ScrollingThread*>(scrollingThread)->threadBody();
-}
-
-void ScrollingThread::threadBody()
-{
-    initializeRunLoop();
-}
-
-void ScrollingThread::dispatchFunctionsFromScrollingThread()
-{
-    ASSERT(isCurrentThread());
-
-    Vector<Function<void()> > functions;
-    
-    {
-        MutexLocker locker(m_functionsMutex);
-        m_functions.swap(functions);
-    }
-    
-    for (size_t i = 0; i < functions.size(); ++i)
-        functions[i]();
-}
-
-} // namespace WebCore
-
-#endif // ENABLE(THREADED_SCROLLING)