Slightly faster quadtree searching

src/core/SkTObjectPool.h

Index: src/core/SkTObjectPool.h
diff --git a/src/core/SkTObjectPool.h b/src/core/SkTObjectPool.h
index 01e8e8e53b24495fb0acfb493c531df0028e05d4..f2a471f634aa4c21f85e0bff168fe40e72a51b3b 100644
--- a/src/core/SkTObjectPool.h
+++ b/src/core/SkTObjectPool.h
@@ -74,6 +74,11 @@ public:
      */
     int blocks() const { return fBlocks.getCount(); }
 
+    /**
+     * Returns the number of items allocated by the pool in total.
+     */
+    int allocated() const { return fBlocks.getCount() * numItemsPerBlock; }
+
 private:
     /**
      * The type for a new block of entries for the list.