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

gm/testimagefilters.cpp

Index: gm/testimagefilters.cpp
diff --git a/gm/testimagefilters.cpp b/gm/testimagefilters.cpp
index 50df0e6aef6f4549be4183046991196c5cee3aba..82fa833de5f974a2a02857b3a619d65b1401acd8 100644
--- a/gm/testimagefilters.cpp
+++ b/gm/testimagefilters.cpp
@@ -97,17 +97,17 @@ public:
 
 protected:
 
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("testimagefilters");
     }
 
-    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+    uint32_t onGetFlags() const SK_OVERRIDE {
         return kSkipTiled_Flag;
     }
 
-    virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(700, 460); }
+    SkISize onISize() SK_OVERRIDE { return SkISize::Make(700, 460); }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
 //        this->drawSizeBounds(canvas, 0xFFCCCCCC);
 
         static SkImageFilter* (*gFilterProc[])() = {