Do not normalize into NFC the values of form fields

Source/core/page/PageSerializer.cpp

Index: Source/core/page/PageSerializer.cpp
diff --git a/Source/core/page/PageSerializer.cpp b/Source/core/page/PageSerializer.cpp
index 407a1b5947f655e481162beb2453c5f6fec32ae4..a1d0cf0ead3d1f3ed29bf02d552d1ddf9465a699 100644
--- a/Source/core/page/PageSerializer.cpp
+++ b/Source/core/page/PageSerializer.cpp
@@ -204,7 +204,7 @@ void PageSerializer::serializeFrame(Frame* frame)
         return;
     }
     String text = accumulator.serializeNodes(document->documentElement(), IncludeNode);
-    CString frameHTML = textEncoding.encode(text, WTF::EntitiesForUnencodables);
+    CString frameHTML = textEncoding.normalizeAndEncode(text, WTF::EntitiesForUnencodables);
     m_resources->append(SerializedResource(url, document->suggestedMIMEType(), SharedBuffer::create(frameHTML.data(), frameHTML.length())));
     m_resourceURLs.add(url);
 
@@ -272,7 +272,7 @@ void PageSerializer::serializeCSSStyleSheet(CSSStyleSheet* styleSheet, const KUR
         WTF::TextEncoding textEncoding(styleSheet->contents()->charset());
         ASSERT(textEncoding.isValid());
         String textString = cssText.toString();
-        CString text = textEncoding.encode(textString, WTF::EntitiesForUnencodables);
+        CString text = textEncoding.normalizeAndEncode(textString, WTF::EntitiesForUnencodables);
         m_resources->append(SerializedResource(url, String("text/css"), SharedBuffer::create(text.data(), text.length())));
         m_resourceURLs.add(url);
     }