Remove PLATFORM(BLACKBERRY) support.

Source/WebCore/rendering/RenderLayerBacking.cpp

Index: Source/WebCore/rendering/RenderLayerBacking.cpp
diff --git a/Source/WebCore/rendering/RenderLayerBacking.cpp b/Source/WebCore/rendering/RenderLayerBacking.cpp
index 4f64e5edec505562a1e5752a2e5a228d0ee9a642..a72408891aa89c3b727a5a940d8a4114d83288a1 100644
--- a/Source/WebCore/rendering/RenderLayerBacking.cpp
+++ b/Source/WebCore/rendering/RenderLayerBacking.cpp
@@ -1621,11 +1621,6 @@ bool RenderLayerBacking::paintsIntoWindow() const
         return false;
 
     if (m_owningLayer->isRootLayer()) {
-#if PLATFORM(BLACKBERRY)
-        if (compositor()->inForcedCompositingMode())
-            return false;
-#endif
-
         return compositor()->rootLayerAttachment() != RenderLayerCompositor::RootLayerAttachedViaEnclosingFrame;
     }
     
@@ -2125,20 +2120,6 @@ double RenderLayerBacking::backingStoreMemoryEstimate() const
     return backingMemory;
 }
 
-#if PLATFORM(BLACKBERRY)
-bool RenderLayerBacking::contentsVisible(const GraphicsLayer*, const IntRect& localContentRect) const
-{
-    Frame* frame = renderer()->frame();
-    FrameView* view = frame ? frame->view() : 0;
-    if (!view)
-        return false;
-
-    IntRect visibleContentRect(view->visibleContentRect());
-    FloatQuad absoluteContentQuad = renderer()->localToAbsoluteQuad(FloatRect(localContentRect));
-    return absoluteContentQuad.enclosingBoundingBox().intersects(visibleContentRect);
-}
-#endif
-
 void RenderLayerBacking::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, PlatformMemoryTypes::Rendering);