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

src/animator/SkDisplayAdd.h

Index: src/animator/SkDisplayAdd.h
diff --git a/src/animator/SkDisplayAdd.h b/src/animator/SkDisplayAdd.h
index 6ba4933acd1d203e3638e15fbc5d6c8b9ca715a8..9e0ff303dcdddacf6c845a0516b07262b345093b 100644
--- a/src/animator/SkDisplayAdd.h
+++ b/src/animator/SkDisplayAdd.h
@@ -22,15 +22,15 @@ class SkAdd : public SkADrawable {
         kMode_immediate
     };
 
-    virtual SkDisplayable* deepCopy(SkAnimateMaker* ) SK_OVERRIDE;
-    virtual bool draw(SkAnimateMaker& ) SK_OVERRIDE;
+    SkDisplayable* deepCopy(SkAnimateMaker* ) SK_OVERRIDE;
+    bool draw(SkAnimateMaker& ) SK_OVERRIDE;
 #ifdef SK_DUMP_ENABLED
-    virtual void dump(SkAnimateMaker* ) SK_OVERRIDE;
+    void dump(SkAnimateMaker* ) SK_OVERRIDE;
 #endif
-    virtual bool enable(SkAnimateMaker& ) SK_OVERRIDE;
-    virtual bool hasEnable() const SK_OVERRIDE;
-    virtual void initialize() SK_OVERRIDE;
-    virtual bool isDrawable() const SK_OVERRIDE;
+    bool enable(SkAnimateMaker& ) SK_OVERRIDE;
+    bool hasEnable() const SK_OVERRIDE;
+    void initialize() SK_OVERRIDE;
+    bool isDrawable() const SK_OVERRIDE;
 protected:
 //  struct _A {
         Mode mode;