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

src/images/SkDecodingImageGenerator.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkData.h"
 #include "SkDecodingImageGenerator.h"
 #include "SkImageDecoder.h"
@@ skipping 26 matching lines @@
                            bool ditherImage);
 
 protected:
     SkData* onRefEncodedData() override;
 #ifdef SK_SUPPORT_LEGACY_BOOL_ONGETINFO
     bool onGetInfo(SkImageInfo* info) override {
         *info = fInfo;
         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;
 };
 
 /**
  *  Special allocator used by getPixels(). Uses preallocated memory
  *  provided if possible, else fall-back on the default allocator
  */
 class TargetAllocator : public SkBitmap::Allocator {
@@ skipping 232 matching lines @@
 
 SkImageGenerator* SkDecodingImageGenerator::Create(
         SkStreamRewindable* stream,
         const SkDecodingImageGenerator::Options& opts) {
     SkASSERT(stream != NULL);
     if (stream == NULL) {
         return NULL;
     }
     return CreateDecodingImageGenerator(NULL, stream, opts);
 }