Remove the setting of default accept header for main resources

Source/core/loader/FrameFetchContext.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/ProgressTracker.h"
 #include "core/page/Page.h"
 #include "core/frame/Settings.h"
 #include "platform/weborigin/SecurityPolicy.h"
 
 namespace WebCore {
 
-static const char defaultAcceptHeader[] = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
-
 FrameFetchContext::FrameFetchContext(LocalFrame* frame)
     : m_frame(frame)
 {
 }
 
 void FrameFetchContext::reportLocalLoadFailed(const KURL& url)
 {
     FrameLoader::reportLocalLoadFailed(m_frame, url.elidedString());
 }
 
@@ skipping 24 matching lines @@
         request.setFirstPartyForCookies(request.url());
     else if (m_frame->tree().top()->isLocalFrame())
         request.setFirstPartyForCookies(m_frame->tree().top()->document()->firstPartyForCookies());
 
     // The remaining modifications are only necessary for HTTP and HTTPS.
     if (!request.url().isEmpty() && !request.url().protocolIsInHTTPFamily())
         return;
 
     m_frame->loader().applyUserAgent(request);
 
-    if (isMainResource)
-        request.setHTTPAccept(defaultAcceptHeader);
-
     // Default to sending an empty Origin header if one hasn't been set yet.
     FrameLoader::addHTTPOriginIfNeeded(request, nullAtom);
 }
 
 CachePolicy FrameFetchContext::cachePolicy(Document* document) const
 {
     if (document && document->loadEventFinished())
         return CachePolicyVerify;
 
     FrameLoadType loadType = m_frame->loader().loadType();
@@ skipping 94 matching lines @@
     if (!response.isNull())
         dispatchDidReceiveResponse(ensureLoader(loader), identifier, response);
 
     if (dataLength > 0)
         dispatchDidReceiveData(ensureLoader(loader), identifier, 0, dataLength, 0);
 
     dispatchDidFinishLoading(ensureLoader(loader), identifier, 0, 0);
 }
 
 } // namespace WebCore