Moved text decoding to the parser thread

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 59a6542c5de492030ac17ef04b00ca0c42031d2c..460ca698407fddc38e58f864fb43436c02096e28 100644
--- a/Source/core/page/PageSerializer.cpp
+++ b/Source/core/page/PageSerializer.cpp
@@ -53,6 +53,7 @@
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLLinkElement.h"
 #include "core/html/HTMLStyleElement.h"
+#include "core/html/parser/HTMLIdentifier.h"
 #include "core/html/parser/HTMLMetaCharsetParser.h"
 #include "core/frame/Frame.h"
 #include "core/page/Page.h"
@@ -80,8 +81,9 @@ static bool isCharsetSpecifyingNode(Node* node)
     if (element->hasAttributes()) {
         for (unsigned i = 0; i < element->attributeCount(); ++i) {
             const Attribute* attribute = element->attributeItem(i);
+            HTMLIdentifier attributeName(attribute->name().localName(), Likely8Bit);
             // FIXME: We should deal appropriately with the attribute if they have a namespace.
-            attributes.append(std::make_pair(attribute->name().toString(), attribute->value().string()));
+            attributes.append(std::make_pair(attributeName, attribute->value().string()));
         }
     }
     WTF::TextEncoding textEncoding = HTMLMetaCharsetParser::encodingFromMetaAttributes(attributes);