Move KillRing to platform/

Source/core/platform/mac/KillRingMac.mm

Index: Source/core/platform/mac/KillRingMac.mm
diff --git a/Source/core/platform/mac/KillRingMac.mm b/Source/core/platform/mac/KillRingMac.mm
deleted file mode 100644
index 6213569d1ec4732c2d61319d6b22435e24024fe4..0000000000000000000000000000000000000000
--- a/Source/core/platform/mac/KillRingMac.mm
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright (C) 2010 Google 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. ``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
- * 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. 
- */
-
-#import "config.h"
-#import "core/platform/KillRing.h"
-
-namespace WebCore {
-
-extern "C" {
-
-// Kill ring calls. Would be better to use NSKillRing.h, but that's not available as API or SPI.
-
-void _NSInitializeKillRing();
-void _NSAppendToKillRing(NSString *);
-void _NSPrependToKillRing(NSString *);
-NSString *_NSYankFromKillRing();
-void _NSNewKillRingSequence();
-void _NSSetKillRingToYankedState();
-
-}
-
-static void initializeKillRingIfNeeded()
-{
-    static bool initializedKillRing = false;
-    if (!initializedKillRing) {
-        initializedKillRing = true;
-        _NSInitializeKillRing();
-    }
-}
-
-void KillRing::append(const String& string)
-{
-    initializeKillRingIfNeeded();
-    _NSAppendToKillRing(string);
-}
-
-void KillRing::prepend(const String& string)
-{
-    initializeKillRingIfNeeded();
-    _NSPrependToKillRing(string);
-}
-
-String KillRing::yank()
-{
-    initializeKillRingIfNeeded();
-    return _NSYankFromKillRing();
-}
-
-void KillRing::startNewSequence()
-{
-    initializeKillRingIfNeeded();
-    _NSNewKillRingSequence();
-}
-
-void KillRing::setToYankedState()
-{
-    initializeKillRingIfNeeded();
-    _NSSetKillRingToYankedState();
-}
-
-} // namespace WebCore