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

gm/pictureimagefilter.cpp

Index: gm/pictureimagefilter.cpp
diff --git a/gm/pictureimagefilter.cpp b/gm/pictureimagefilter.cpp
index 5f29a34b79bede19c7f26cfdd87d29a5c303409b..eae758d344fbdb7d8d5417f719cdd29de7d436fc 100644
--- a/gm/pictureimagefilter.cpp
+++ b/gm/pictureimagefilter.cpp
@@ -18,7 +18,7 @@ public:
     }
 
 protected:
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("pictureimagefilter");
     }
 
@@ -36,9 +36,9 @@ protected:
         fPicture.reset(recorder.endRecording());
     }
 
-    virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(600, 300); }
+    SkISize onISize() SK_OVERRIDE { return SkISize::Make(600, 300); }
 
-    virtual void onOnceBeforeDraw() SK_OVERRIDE {
+    void onOnceBeforeDraw() SK_OVERRIDE {
         this->makePicture();
     }
 
@@ -51,7 +51,7 @@ protected:
         canvas->restore();
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         canvas->clear(0x00000000);
         {
             SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);