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

tests/PDFInvalidBitmapTest.cpp

Index: tests/PDFInvalidBitmapTest.cpp
diff --git a/tests/PDFInvalidBitmapTest.cpp b/tests/PDFInvalidBitmapTest.cpp
index 2f4753e4a440f1d29abb431a1921745d9be71664..bc7143a15930b7b00ed31403a9ee559abf352344 100644
--- a/tests/PDFInvalidBitmapTest.cpp
+++ b/tests/PDFInvalidBitmapTest.cpp
@@ -23,8 +23,8 @@ class InvalidPixelRef : public SkPixelRef {
 public:
     InvalidPixelRef(const SkImageInfo& info) : SkPixelRef(info) {}
 private:
-    virtual bool onNewLockPixels(LockRec*) SK_OVERRIDE { return false; }
-    virtual void onUnlockPixels() SK_OVERRIDE {
+    bool onNewLockPixels(LockRec*) SK_OVERRIDE { return false; }
+    void onUnlockPixels() SK_OVERRIDE {
         SkDEBUGFAIL("InvalidPixelRef can't be locked");
     }
 };