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

src/lazy/SkDiscardablePixelRef.h

Index: src/lazy/SkDiscardablePixelRef.h
diff --git a/src/lazy/SkDiscardablePixelRef.h b/src/lazy/SkDiscardablePixelRef.h
index 142c8a45399b3f0f62bd497ea3d681a6d7b59e4d..448f0ab24b907c1fe7b3ce1e49146905e30f0cd3 100644
--- a/src/lazy/SkDiscardablePixelRef.h
+++ b/src/lazy/SkDiscardablePixelRef.h
@@ -25,11 +25,11 @@ public:
 protected:
     ~SkDiscardablePixelRef();
 
-    virtual bool onNewLockPixels(LockRec*) SK_OVERRIDE;
-    virtual void onUnlockPixels() SK_OVERRIDE;
-    virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; }
+    bool onNewLockPixels(LockRec*) SK_OVERRIDE;
+    void onUnlockPixels() SK_OVERRIDE;
+    bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; }
 
-    virtual SkData* onRefEncodedData() SK_OVERRIDE {
+    SkData* onRefEncodedData() SK_OVERRIDE {
         return fGenerator->refEncodedData();
     }