Removing a bunch of unused platform code.

Source/WebCore/platform/graphics/PlatformLayer.h

Index: Source/WebCore/platform/graphics/PlatformLayer.h
diff --git a/Source/WebCore/platform/graphics/PlatformLayer.h b/Source/WebCore/platform/graphics/PlatformLayer.h
index 0097e8f9cadee1d6fee2afc448773a05a59f9930..98406fc967d64e43c2da6abbfb35b48530fef5b4 100644
--- a/Source/WebCore/platform/graphics/PlatformLayer.h
+++ b/Source/WebCore/platform/graphics/PlatformLayer.h
@@ -26,45 +26,15 @@
 #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)