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

gm/gradientDirtyLaundry.cpp

Index: gm/gradientDirtyLaundry.cpp
diff --git a/gm/gradientDirtyLaundry.cpp b/gm/gradientDirtyLaundry.cpp
index a452763a9be7d9381fb7c18053a93c118df600d4..8c27b8f4293c89dd0a002c1bd89264a60a1f673e 100644
--- a/gm/gradientDirtyLaundry.cpp
+++ b/gm/gradientDirtyLaundry.cpp
@@ -71,9 +71,9 @@ public:
 
 protected:
     SkString onShortName() SK_OVERRIDE { return SkString("gradient_dirty_laundry"); }
-    virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(640, 615); }
+    SkISize onISize() SK_OVERRIDE { return SkISize::Make(640, 615); }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkPoint pts[2] = { { 0, 0 },
                            { SkIntToScalar(100), SkIntToScalar(100) }
         };