Remove SkQuadTree.

include/core/SkBBHFactory.h

Index: include/core/SkBBHFactory.h
diff --git a/include/core/SkBBHFactory.h b/include/core/SkBBHFactory.h
index 4c0384422117b0635d11e4428bcdd33e9412d60b..67c9cd767d5f1f0480c55e508b733c48dac3274a 100644
--- a/include/core/SkBBHFactory.h
+++ b/include/core/SkBBHFactory.h
@@ -22,14 +22,6 @@ public:
     virtual ~SkBBHFactory() {};
 };
 
-class SK_API SkQuadTreeFactory : public SkBBHFactory {
-public:
-    virtual SkBBoxHierarchy* operator()(int width, int height) const SK_OVERRIDE;
-private:
-    typedef SkBBHFactory INHERITED;
-};
-
-
 class SK_API SkRTreeFactory : public SkBBHFactory {
 public:
     virtual SkBBoxHierarchy* operator()(int width, int height) const SK_OVERRIDE;