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

include/effects/SkDisplacementMapEffect.h

Index: include/effects/SkDisplacementMapEffect.h
diff --git a/include/effects/SkDisplacementMapEffect.h b/include/effects/SkDisplacementMapEffect.h
index dd11582bdb64d74884b41f18548a1167c8324d89..e55b324ce9da755c88ca95e590b8667f801adf19 100644
--- a/include/effects/SkDisplacementMapEffect.h
+++ b/include/effects/SkDisplacementMapEffect.h
@@ -37,13 +37,13 @@ public:
                                const Context& ctx,
                                SkBitmap* dst,
                                SkIPoint* offset) const SK_OVERRIDE;
-    virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
+    void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
 
     virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
                                 SkIRect* dst) const SK_OVERRIDE;
 
 #if SK_SUPPORT_GPU
-    virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
+    bool canFilterImageGPU() const SK_OVERRIDE { return true; }
     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 #endif
@@ -56,7 +56,7 @@ protected:
                             SkScalar scale, SkImageFilter* inputs[2],
                             const CropRect* cropRect,
                             uint32_t uniqueID);
-    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
+    void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
 private:
     ChannelSelectorType fXChannelSelector;