Deprecate fetching stylesheets with unsupported type

third_party/WebKit/Source/core/html/HTMLLinkElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Rob Buis (rwlbuis@gmail.com)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 573 matching lines @@
 
 bool LinkStyle::styleSheetIsLoading() const
 {
     if (m_loading)
         return true;
     if (!m_sheet)
         return false;
     return m_sheet->contents()->isLoading();
 }
 
+bool LinkStyle::styleSheetTypeIsSupported(const String& type) const

[esprehn, 2015/12/17 07:07:07]

This is static it doesn't need to be a method, move it to be static in the cpp
file.

[suzyh_UTC10 (ex-contributor), 2016/01/18 07:28:27]

Done.

+{
+    return type.isEmpty() || type.contains("text/css");
+}
+
 void LinkStyle::addPendingSheet(PendingSheetType type)
 {
     if (type <= m_pendingSheetType)
         return;
     m_pendingSheetType = type;
 
     if (m_pendingSheetType == NonBlocking)
         return;
     m_owner->document().styleEngine().addPendingSheet();
 }
@@ skipping 84 matching lines @@
             return;
         if (!document().contentSecurityPolicy()->allowImageFromSource(builder.url()))
             return;
         if (document().frame() && document().frame()->loader().client())
             document().frame()->loader().client()->dispatchDidChangeIcons(m_owner->relAttribute().iconType());
     }
 
     if (!m_owner->loadLink(type, as, builder.url()))
         return;
 
-    if (m_disabledState != Disabled && m_owner->relAttribute().isStyleSheet() && shouldLoadResource() && builder.url().isValid()) {
+    if (m_disabledState != Disabled && m_owner->relAttribute().isStyleSheet() && styleSheetTypeIsSupported(type) && shouldLoadResource() && builder.url().isValid()) {
 
         if (resource()) {
             removePendingSheet();
             clearResource();
             clearFetchFollowingCORS();
         }
 
         if (!m_owner->shouldLoadLink())
             return;
 
@@ skipping 51 matching lines @@
         removePendingSheet();
 }
 
 DEFINE_TRACE(LinkStyle)
 {
     visitor->trace(m_sheet);
     LinkResource::trace(visitor);
 }
 
 } // namespace blink