Add missing SK_OVERRIDE

gm/factory.cpp

Index: gm/factory.cpp
diff --git a/gm/factory.cpp b/gm/factory.cpp
index 1e89d3df728b15bb14768070321bf18b26f3da72..08701d3cfc4383de6ec5b6fcf2d3dfcbf5a2400e 100644
--- a/gm/factory.cpp
+++ b/gm/factory.cpp
@@ -41,15 +41,15 @@ protected:
         }
     }
 
-    virtual SkString onShortName() {
+    virtual SkString onShortName() SK_OVERRIDE {
         return SkString("factory");
     }
 
-    virtual SkISize onISize() {
+    virtual SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(640, 480);
     }
 
-    virtual void onDraw(SkCanvas* canvas) {
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         canvas->drawBitmap(fBitmap, 0, 0);
     }