Refactoring: Simplify DocumentWriter by reorganizing its lifetime.

Source/core/loader/TextResourceDecoderBuilder.cpp

Index: Source/core/loader/TextResourceDecoderBuilder.cpp
diff --git a/Source/core/loader/TextResourceDecoderBuilder.cpp b/Source/core/loader/TextResourceDecoderBuilder.cpp
index ecb9ae57e5cabb1d9df8a33047d4eb48bde97f1e..1ad37828d0333ef89d92221ce49f4e8045d9045a 100644
--- a/Source/core/loader/TextResourceDecoderBuilder.cpp
+++ b/Source/core/loader/TextResourceDecoderBuilder.cpp
@@ -44,8 +44,10 @@ static inline bool canReferToParentFrameEncoding(const Frame* frame, const Frame
 }
 
 
-TextResourceDecoderBuilder::TextResourceDecoderBuilder()
-    : m_encodingWasChosenByUser(false)
+TextResourceDecoderBuilder::TextResourceDecoderBuilder(const String& mimeType, const String& encoding, bool encodingUserChoosen)
+    : m_mimeType(mimeType)
+    , m_encoding(encoding)
+    , m_encodingWasChosenByUser(encodingUserChoosen)
 {
 }
 
@@ -96,12 +98,6 @@ PassRefPtr<TextResourceDecoder> TextResourceDecoderBuilder::buildFor(Document* d
     return decoder.release();
 }
 
-void TextResourceDecoderBuilder::setEncoding(const String& encoding, bool userChosen)
-{
-    m_encoding = encoding;
-    m_encodingWasChosenByUser = userChosen;
-}
-
 void TextResourceDecoderBuilder::clear()
 {
     if (!m_encodingWasChosenByUser)