Provide user friendly messages for OTS parsing of fonts

Source/core/css/FontLoader.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/css/FontLoader.h"
 
 #include "core/css/CSSFontSelector.h"
 #include "core/dom/Document.h"
 #include "core/dom/IncrementLoadEventDelayCount.h"
@@ skipping 80 matching lines @@
     if (m_fontSelector)
         m_fontSelector->fontFaceInvalidated();
 }
 
 void FontLoader::didFailToDecode(FontResource* fontResource)
 {
     // FIXME: Provide more useful message such as OTS rejection reason.
     // See crbug.com/97467
     if (m_fontSelector && m_fontSelector->document())
         m_fontSelector->document()->addConsoleMessage(ConsoleMessage::create(OtherMessageSource, WarningMessageLevel, "Failed to decode downloaded font: " + fontResource->url().elidedString()));
+        if (fontResource->otsParsingMessage().length() > 1)
+            m_fontSelector->document()->addConsoleMessage(ConsoleMessage::create(OtherMessageSource, WarningMessageLevel, "OTS parsing error: " + fontResource->otsParsingMessage()));
 }
 
 #if !ENABLE(OILPAN)
 void FontLoader::clearDocumentAndFontSelector()
 {
     if (!m_document) {
         ASSERT(m_fontsToBeginLoading.isEmpty());
         return;
     }
 
@@ skipping 11 matching lines @@
     m_fontsToBeginLoading.clear();
 }
 
 DEFINE_TRACE(FontLoader)
 {
     visitor->trace(m_document);
     visitor->trace(m_fontSelector);
 }
 
 } // namespace blink