Remove all of WebCore/platform/mac which is not mentioned in WebCore.gypi.

Source/WebCore/platform/mac/PlatformClockCM.h

Index: Source/WebCore/platform/mac/PlatformClockCM.h
diff --git a/Source/WebCore/platform/mac/PlatformClockCM.h b/Source/WebCore/platform/mac/PlatformClockCM.h
deleted file mode 100644
index e0349153096b432ec2c603012fd7aacdff39de98..0000000000000000000000000000000000000000
--- a/Source/WebCore/platform/mac/PlatformClockCM.h
+++ /dev/null
@@ -1,66 +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 COMPUTER, INC. ``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 COMPUTER, INC. OR
- * 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 PlatformClockCM_h
-#define PlatformClockCM_h
-
-#if USE(COREMEDIA)
-
-#include "Clock.h"
-#include <wtf/RetainPtr.h>
-
-typedef struct OpaqueCMTimebase* CMTimebaseRef;
-typedef struct OpaqueCMClock* CMClockRef;
-
-namespace WebCore {
-
-class PlatformClockCM : public Clock {
-public:
-    PlatformClockCM();
-    PlatformClockCM(CMClockRef);
-
-private:
-    void initializeWithTimingSource(CMClockRef);
-
-    virtual void setCurrentTime(float);
-    virtual float currentTime() const;
-
-    virtual void setPlayRate(float);
-    virtual float playRate() const { return m_rate; }
-
-    virtual void start();
-    virtual void stop();
-    virtual bool isRunning() const { return m_running; }
-
-    RetainPtr<CMTimebaseRef> m_timebase;
-    float m_rate;
-    bool m_running;
-};
-
-}
-
-#endif
-
-#endif