One allocation for an SkData which makes a copy.

include/core/SkData.h

Index: include/core/SkData.h
===================================================================
--- include/core/SkData.h	(revision 9507)
+++ include/core/SkData.h	(working copy)
@@ -133,12 +133,15 @@
     virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
 
 private:
-    ReleaseProc fReleaseProc;
-    void*       fReleaseProcContext;
+    /** Called when the ref count goes to zero. */
+    virtual void internal_dispose() const SK_OVERRIDE;
+    
+    size_t const fSize;
+    void const * const fPtr;
+    
+    ReleaseProc const fReleaseProc;
+    void * const fReleaseProcContext;
 
-    const void* fPtr;
-    size_t      fSize;
-
     SkData(const void* ptr, size_t size, ReleaseProc, void* context);
     virtual ~SkData();