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

gm/shallowgradient.cpp

Index: gm/shallowgradient.cpp
diff --git a/gm/shallowgradient.cpp b/gm/shallowgradient.cpp
index a2b29d37ed8064632d7a38affa7f8a1a8d6d9538..6cd2ed61f49e4e0de2253ecba0894f8c746780c1 100644
--- a/gm/shallowgradient.cpp
+++ b/gm/shallowgradient.cpp
@@ -42,22 +42,22 @@ public:
     }
 
 protected:
-    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+    uint32_t onGetFlags() const SK_OVERRIDE {
         if (fName.contains("linear") || fName.contains("radial")) {
             return kSkipTiled_Flag;
         }
         return 0;
     }
 
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return fName;
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(800, 800);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         const SkColor colors[] = { 0xFF555555, 0xFF444444 };
         const int colorCount = SK_ARRAY_COUNT(colors);