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

gm/bigblurs.cpp

Index: gm/bigblurs.cpp
diff --git a/gm/bigblurs.cpp b/gm/bigblurs.cpp
index 105bd452d937bb061cb4c3503b55dca55cf565a2..39713c5a71cc7cdef13681870c8661f21afb92a8 100644
--- a/gm/bigblurs.cpp
+++ b/gm/bigblurs.cpp
@@ -23,15 +23,15 @@ public:
     }
 
 protected:
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("bigblurs");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(kWidth, kHeight);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         static const int kBig = 65536;
         static const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4));