Update more directories under src/ to follow C++11 style rule for {virtual,override}.

src/images/SkDecodingImageGenerator.cpp

Index: src/images/SkDecodingImageGenerator.cpp
diff --git a/src/images/SkDecodingImageGenerator.cpp b/src/images/SkDecodingImageGenerator.cpp
index 329730ab3e6bbd67641c3a08ef5219e3a9fd00a6..78027f42e289b71a2c58304bef71612b83369384 100644
--- a/src/images/SkDecodingImageGenerator.cpp
+++ b/src/images/SkDecodingImageGenerator.cpp
@@ -44,11 +44,11 @@ protected:
         return true;
     }
 #endif
-    virtual Result onGetPixels(const SkImageInfo& info,
-                               void* pixels, size_t rowBytes, const Options&,
-                               SkPMColor ctable[], int* ctableCount) override;
-    virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
-                                 SkYUVColorSpace* colorSpace) override;
+    Result onGetPixels(const SkImageInfo& info,
+                       void* pixels, size_t rowBytes, const Options&,
+                       SkPMColor ctable[], int* ctableCount) override;
+    bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
+                         SkYUVColorSpace* colorSpace) override;
 
 private:
     typedef SkImageGenerator INHERITED;