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

gm/thinrects.cpp

Index: gm/thinrects.cpp
diff --git a/gm/thinrects.cpp b/gm/thinrects.cpp
index 6517fe2796d27a6cadb163030560b68599581d34..3facaa9705f6f6186ba6948af3adea493fcf54d2 100644
--- a/gm/thinrects.cpp
+++ b/gm/thinrects.cpp
@@ -17,15 +17,15 @@ public:
     }
 
 protected:
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("thinrects");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(240, 320);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
 
         SkPaint white;
         white.setColor(SK_ColorWHITE);