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

gm/picture.cpp

Index: gm/picture.cpp
diff --git a/gm/picture.cpp b/gm/picture.cpp
index 1f7e5c38c9f9ab37b56dc73839707af80bc24b84..b07a5969a99ec31748489be07d61731bef21f187 100644
--- a/gm/picture.cpp
+++ b/gm/picture.cpp
@@ -42,15 +42,15 @@ public:
     PictureGM() : fPicture(make_picture()) {}
 
 protected:
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("pictures");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(450, 120);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         canvas->translate(10, 10);
 
         SkMatrix matrix;