Remove mail blockquote special case handling.

Source/WebCore/editing/TypingCommand.h

Index: Source/WebCore/editing/TypingCommand.h
diff --git a/Source/WebCore/editing/TypingCommand.h b/Source/WebCore/editing/TypingCommand.h
index 950eec80a3ba0bab007a4487d2bf443129553dd1..b1ce2c33ccf544200223e785045bff2693a22637 100644
--- a/Source/WebCore/editing/TypingCommand.h
+++ b/Source/WebCore/editing/TypingCommand.h
@@ -39,7 +39,6 @@ public:
         InsertText, 
         InsertLineBreak, 
         InsertParagraphSeparator,
-        InsertParagraphSeparatorInQuotedContent
     };
 
     enum TextCompositionType {
@@ -64,13 +63,11 @@ public:
     static void insertText(Document*, const String&, const VisibleSelection&, Options, TextCompositionType = TextCompositionNone);
     static void insertLineBreak(Document*, Options);
     static void insertParagraphSeparator(Document*, Options);
-    static void insertParagraphSeparatorInQuotedContent(Document*);
     static void closeTyping(Frame*);
 
     void insertText(const String &text, bool selectInsertedText);
     void insertTextRunWithoutNewlines(const String &text, bool selectInsertedText);
     void insertLineBreak();
-    void insertParagraphSeparatorInQuotedContent();
     void insertParagraphSeparator();
     void deleteKeyPressed(TextGranularity, bool killRing);
     void forwardDeleteKeyPressed(TextGranularity, bool killRing);