get rid of GraphicPlane

its functionality is now folded into DisplayHardware
there will be more changes in that area.
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 32456f4..d47f2e8 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -66,18 +66,17 @@
     // LayerBase interface
     virtual void setGeometry(HWComposer::HWCLayerInterface& layer);
     virtual void setPerFrameData(HWComposer::HWCLayerInterface& layer);
-    virtual void onDraw(const Region& clip) const;
+    virtual void onDraw(const DisplayHardware& hw, const Region& clip) const;
     virtual uint32_t doTransaction(uint32_t transactionFlags);
     virtual void lockPageFlip(bool& recomputeVisibleRegions);
     virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
     virtual bool isOpaque() const;
-    virtual bool needsDithering() const     { return mNeedsDithering; }
     virtual bool isSecure() const           { return mSecure; }
     virtual bool isProtected() const;
     virtual void onRemoved();
     virtual sp<Layer> getLayer() const { return const_cast<Layer*>(this); }
     virtual void setName(const String8& name);
-    virtual void validateVisibility(const Transform& globalTransform);
+    virtual void validateVisibility(const Transform& globalTransform, const DisplayHardware& hw);
 
     // LayerBaseClient interface
     virtual wp<IBinder> getSurfaceTextureBinder() const;
@@ -137,7 +136,6 @@
     PixelFormat mFormat;
     const GLExtensions& mGLExtensions;
     bool mOpaqueLayer;
-    bool mNeedsDithering;
 
     // page-flip thread (currently main thread)
     bool mSecure;         // no screenshots