remove DocumentParser::startParsing()

This CL removes |DocumentParser::startParsing()|.
This was only used from XMLDocumentParser, but it was a no-op.
The method initializes |m_state| to |ParsingState|, however the state should
already be in |ParsingState| from c-tor initializer.

BUG=404107

Review URL: https://codereview.chromium.org/471423002

git-svn-id: svn://svn.chromium.org/blink/trunk@180425 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/dom/DocumentParser.cpp

@@ -65,11 +65,6 @@ TextResourceDecoder* DocumentParser::decoder()
     return 0;
 }
 
-void DocumentParser::startParsing()
-{
-    m_state = ParsingState;
-}
-
 void DocumentParser::prepareToStopParsing()
 {
     ASSERT(m_state == ParsingState);

third_party/WebKit/Source/core/dom/DocumentParser.h

@@ -79,9 +79,6 @@ public:
     bool isStopped() const { return m_state >= StoppedState; }
     bool isDetached() const { return m_state == DetachedState; }
 
-    // FIXME: Is this necessary? Does XMLDocumentParserLibxml2 really need to set this?
-    virtual void startParsing();
-
     // prepareToStop() is used when the EOF token is encountered and parsing is to be
     // stopped normally.
     virtual void prepareToStopParsing();

third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp

@@ -1434,7 +1434,6 @@ void XMLDocumentParser::initializeParserContext(const CString& chunk)
     sax.ignorableWhitespace = ignorableWhitespaceHandler;
     sax.entityDecl = xmlSAX2EntityDecl;
     sax.initialized = XML_SAX2_MAGIC;
-    DocumentParser::startParsing();
     m_sawError = false;
     m_sawCSS = false;
     m_sawXSLTransform = false;