Remove PLATFORM(BLACKBERRY) support.

Source/WebCore/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 105 matching lines @@
 #include "SVGNames.h"
 #endif
 
 #if ENABLE(CSS_SHADERS) && USE(3D_GRAPHICS)
 #include "CustomFilterGlobalContext.h"
 #include "CustomFilterOperation.h"
 #include "CustomFilterValidatedProgram.h"
 #include "ValidatedCustomFilterOperation.h"
 #endif
 
-#if PLATFORM(BLACKBERRY)
-#define DISABLE_ROUNDED_CORNER_CLIPPING
-#endif
-
 #define MIN_INTERSECT_FOR_REVEAL 32
 
 using namespace std;
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 const int MinimumWidthWhileResizing = 100;
 const int MinimumHeightWhileResizing = 40;
@@ skipping 6206 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif