Document* -> Document& for loadSubimages and friends.

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

Index: third_party/WebKit/Source/core/style/StyleFetchedImage.h
diff --git a/third_party/WebKit/Source/core/style/StyleFetchedImage.h b/third_party/WebKit/Source/core/style/StyleFetchedImage.h
index 994f19e2f13f48ccdf565229e58fbae83ed0dbcf..d403563086eac9a7cc2e09794496ef480ef83a36 100644
--- a/third_party/WebKit/Source/core/style/StyleFetchedImage.h
+++ b/third_party/WebKit/Source/core/style/StyleFetchedImage.h
@@ -37,7 +37,7 @@ class StyleFetchedImage final : public StyleImage, private ResourceClient {
     USING_PRE_FINALIZER(StyleFetchedImage, dispose);
     USING_GARBAGE_COLLECTED_MIXIN(StyleFetchedImage);
 public:
-    static StyleFetchedImage* create(ImageResource* image, Document* document, const KURL& url)
+    static StyleFetchedImage* create(ImageResource* image, const Document& document, const KURL& url)
     {
         return new StyleFetchedImage(image, document, url);
     }
@@ -65,12 +65,12 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    StyleFetchedImage(ImageResource*, Document*, const KURL&);
+    StyleFetchedImage(ImageResource*, const Document&, const KURL&);
 
     void dispose();
 
     Member<ImageResource> m_image;
-    Member<Document> m_document;
+    Member<const Document> m_document;
     const KURL m_url;
 };