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

gm/patchgrid.cpp

Index: gm/patchgrid.cpp
diff --git a/gm/patchgrid.cpp b/gm/patchgrid.cpp
index 79baf9425388f230a6b7b674e5bbd205f7347d65..aefa20b0e57803f70cec6a74d3135e14e2579343 100644
--- a/gm/patchgrid.cpp
+++ b/gm/patchgrid.cpp
@@ -64,19 +64,19 @@ public:
     }
 
 protected:
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("patch_grid");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(800, 800);
     }
 
-    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+    uint32_t onGetFlags() const SK_OVERRIDE {
         return kSkipTiled_Flag;
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
 
         SkPaint paint;