Add WebPageImportanceSignals::issuedNonGetFetchFromScript()

Source/core/xmlhttprequest/XMLHttpRequest.cpp

 /*
  *  Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005-2007 Alexey Proskuryakov <ap@webkit.org>
  *  Copyright (C) 2007, 2008 Julien Chaffraix <jchaffraix@webkit.org>
  *  Copyright (C) 2008, 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
@@ skipping 555 matching lines @@
     if (!password.isNull())
         url.setPass(password);
 
     open(method, url, async, exceptionState);
 }
 
 void XMLHttpRequest::open(const AtomicString& method, const KURL& url, bool async, ExceptionState& exceptionState)
 {
     WTF_LOG(Network, "XMLHttpRequest %p open('%s', '%s', %d)", this, method.utf8().data(), url.elidedString().utf8().data(), async);
 
+    if (method != "GET") {

[yhirano, 2015/08/20 07:46:55]

Is it better to place the block on send function?

+        document()->frame()->page()->chromeClient().observedNonGetXHR();
+    }
+
     if (!internalAbort())
         return;
 
     State previousState = m_state;
     m_state = UNSENT;
     m_error = false;
     m_uploadComplete = false;
 
     if (!isValidHTTPToken(method)) {
         exceptionState.throwDOMException(SyntaxError, "'" + method + "' is not a valid HTTP method.");
@@ skipping 1107 matching lines @@
     visitor->trace(m_responseDocumentParser);
     visitor->trace(m_progressEventThrottle);
     visitor->trace(m_upload);
     visitor->trace(m_blobLoader);
     XMLHttpRequestEventTarget::trace(visitor);
     DocumentParserClient::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink