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

gm/extractbitmap.cpp

Index: gm/extractbitmap.cpp
diff --git a/gm/extractbitmap.cpp b/gm/extractbitmap.cpp
index 711a20a481794a47a204629f2aa69af36ad56d07..c324483336fd1477de2a13cded8e862c3f867f6f 100644
--- a/gm/extractbitmap.cpp
+++ b/gm/extractbitmap.cpp
@@ -32,15 +32,15 @@ public:
 
 protected:
     // overrides from SkEventSink
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("extractbitmap");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(600, 600);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkBitmap bitmap;
         create_bitmap(&bitmap);
         int x = bitmap.width() / 2;