Fix up all the easy virtual ... SK_OVERRIDE cases.

gm/smallarc.cpp

Index: gm/smallarc.cpp
diff --git a/gm/smallarc.cpp b/gm/smallarc.cpp
index c311460e54f8cb75cec6a8bae3182a2f2abd0feb..ff7f07c2ecb2b899d4cd6176187be9e0a7495c21 100755
--- a/gm/smallarc.cpp
+++ b/gm/smallarc.cpp
@@ -19,15 +19,15 @@ public:
 
 protected:
 
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("smallarc");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(762, 762);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkPaint p;
         p.setColor(SK_ColorRED);
         p.setAntiAlias(true);