Make GrGpuResource::gpuMemorySize non-virtual w/ onGpuMemorySize virtual impl

src/gpu/gl/GrGLPath.h

Index: src/gpu/gl/GrGLPath.h
diff --git a/src/gpu/gl/GrGLPath.h b/src/gpu/gl/GrGLPath.h
index 935a2e24ad090b641d54211f52b6b27cd644de25..b8bd8ad1a4ba0966ac4f65f750c9c256548883fe 100644
--- a/src/gpu/gl/GrGLPath.h
+++ b/src/gpu/gl/GrGLPath.h
@@ -30,15 +30,15 @@ public:
     GrGLPath(GrGpuGL* gpu, const SkPath& path, const SkStrokeRec& stroke);
     virtual ~GrGLPath();
     GrGLuint pathID() const { return fPathID; }
-    // TODO: Figure out how to get an approximate size of the path in Gpu
-    // memory.
-    virtual size_t gpuMemorySize() const SK_OVERRIDE { return 100; }
 
 protected:
     virtual void onRelease() SK_OVERRIDE;
     virtual void onAbandon() SK_OVERRIDE;
 
 private:
+    // TODO: Figure out how to get an approximate size of the path in Gpu memory.
+    virtual size_t onGpuMemorySize() const SK_OVERRIDE { return 100; }
+
     GrGLuint fPathID;
 
     typedef GrPath INHERITED;