Store the Document's encoding on the Document

Source/core/page/FrameView.cpp

Index: Source/core/page/FrameView.cpp
diff --git a/Source/core/page/FrameView.cpp b/Source/core/page/FrameView.cpp
index 8ed41521d20c67e53485fcd93b12ce409f7e4450..fab9c329c8e9380a1fec7067a00f93a8f05168ef 100644
--- a/Source/core/page/FrameView.cpp
+++ b/Source/core/page/FrameView.cpp
@@ -1451,8 +1451,8 @@ bool FrameView::scrollToFragment(const KURL& url)
         return true;
 
     // Try again after decoding the ref, based on the document's encoding.
-    if (TextResourceDecoder* decoder = m_frame->document()->decoder())
-        return scrollToAnchor(decodeURLEscapeSequences(fragmentIdentifier, decoder->encoding()));
+    if (m_frame->document()->encoding().isValid())
+        return scrollToAnchor(decodeURLEscapeSequences(fragmentIdentifier, m_frame->document()->encoding()));
 
     return false;
 }