Removing a bunch of unused platform code.

Source/WebCore/platform/graphics/PlatformLayer.h

 /*
  * Copyright (C) 2012 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 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 PlatformLayer_h
 #define PlatformLayer_h
 
+// FIXME: this file should go away.
 #if USE(ACCELERATED_COMPOSITING)
 
-#if PLATFORM(MAC)
-OBJC_CLASS CALayer;
-typedef CALayer PlatformLayer;
-#elif PLATFORM(WIN)
-typedef struct _CACFLayer PlatformLayer;
-#elif PLATFORM(QT)
-namespace WebCore {
-class TextureMapperPlatformLayer;
-typedef TextureMapperPlatformLayer PlatformLayer;
-};
-#elif PLATFORM(CHROMIUM)
 namespace WebKit {
 class WebLayer;
 }
 namespace WebCore {
 typedef WebKit::WebLayer PlatformLayer;
 }
-#elif PLATFORM(GTK)
-#if USE(TEXTURE_MAPPER_GL)
-namespace WebCore {
-class TextureMapperPlatformLayer;
-typedef TextureMapperPlatformLayer PlatformLayer;
-};
-#elif USE(CLUTTER)
-typedef struct _ClutterActor ClutterActor;
-namespace WebCore {
-typedef ClutterActor PlatformLayer;
-};
-#endif
-#elif PLATFORM(BLACKBERRY)
-namespace WebCore {
-class LayerWebKitThread;
-typedef LayerWebKitThread PlatformLayer;
-}
-#else
-typedef void* PlatformLayer;
-#endif
 
 #endif // USE(ACCELERATED_COMPOSITING)
 
 #endif // PlatformLayer_h