Mark StyleGeneratedImage::m_fixedSize as const

third_party/WebKit/Source/core/style/StyleGeneratedImage.h

Index: third_party/WebKit/Source/core/style/StyleGeneratedImage.h
diff --git a/third_party/WebKit/Source/core/style/StyleGeneratedImage.h b/third_party/WebKit/Source/core/style/StyleGeneratedImage.h
index 6a810b399cc74c9de5118dba90432bbcdef0c07f..3b4dedce10610963ee521f1700a9120574714011 100644
--- a/third_party/WebKit/Source/core/style/StyleGeneratedImage.h
+++ b/third_party/WebKit/Source/core/style/StyleGeneratedImage.h
@@ -61,7 +61,7 @@ private:
     // TODO(sashab): Replace this with <const CSSImageGeneratorValue> once RefPtrWillBeMember<>
     // supports const types.
     RefPtrWillBeMember<CSSImageGeneratorValue> m_imageGeneratorValue;
-    bool m_fixedSize;
+    const bool m_fixedSize;
 };
 
 DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleGeneratedImage, isGeneratedImage());