Fire error events for a variety of script and style failures.

Source/core/dom/StyleElement.cpp

 /*
  * Copyright (C) 2006, 2007 Rob Buis
  * Copyright (C) 2008 Apple, 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 44 matching lines @@
 }
 
 StyleElement::~StyleElement()
 {
 #if !ENABLE(OILPAN)
     if (m_sheet)
         clearSheet();
 #endif
 }
 
-void StyleElement::processStyleSheet(Document& document, Element* element)
+StyleElement::ProcessingResult StyleElement::processStyleSheet(Document& document, Element* element)
 {
     TRACE_EVENT0("blink", "StyleElement::processStyleSheet");
     ASSERT(element);
     ASSERT(element->inDocument());
 
     m_registeredAsCandidate = true;
     document.styleEngine().addStyleSheetCandidateNode(element, m_createdByParser);
     if (m_createdByParser)
-        return;
+        return ProcessingSuccessful;
 
-    process(element);
+    return process(element);
 }
 
 void StyleElement::insertedInto(Element* element, ContainerNode* insertionPoint)
 {
     if (!insertionPoint->inDocument() || !element->isInShadowTree())
         return;
     if (ShadowRoot* scope = element->containingShadowRoot())
         scope->registerScopedHTMLStyleChild();
 }
 
@@ skipping 27 matching lines @@
 {
     if (m_sheet)
         m_sheet->clearOwnerNode();
 
     if (m_registeredAsCandidate) {
         ASSERT(element->inDocument());
         document.styleEngine().removeStyleSheetCandidateNode(element, element->treeScope());
     }
 }
 
-void StyleElement::childrenChanged(Element* element)
+StyleElement::ProcessingResult StyleElement::childrenChanged(Element* element)
 {
     ASSERT(element);
     if (m_createdByParser)
-        return;
+        return ProcessingSuccessful;
 
-    process(element);
+    return process(element);
 }
 
-void StyleElement::finishParsingChildren(Element* element)
+StyleElement::ProcessingResult StyleElement::finishParsingChildren(Element* element)
 {
     ASSERT(element);
-    process(element);
+    ProcessingResult result = process(element);
     m_createdByParser = false;
+    return result;
 }
 
-void StyleElement::process(Element* element)
+StyleElement::ProcessingResult StyleElement::process(Element* element)
 {
     if (!element || !element->inDocument())
-        return;
-    createSheet(element, element->textFromChildren());
+        return ProcessingSuccessful;
+    return createSheet(element, element->textFromChildren());
 }
 
 void StyleElement::clearSheet(Element* ownerElement)
 {
     ASSERT(m_sheet);
 
     if (ownerElement && m_sheet->isLoading())
         ownerElement->document().styleEngine().removePendingSheet(ownerElement);
 
     m_sheet.release()->clearOwnerNode();
 }
 
 static bool shouldBypassMainWorldCSP(Element* element)
 {
     // Main world CSP is bypassed within an isolated world.
     LocalFrame* frame = element->document().frame();
     if (frame && frame->script().shouldBypassMainWorldCSP())
         return true;
 
     // Main world CSP is bypassed for style elements in user agent shadow DOM.
     ShadowRoot* root = element->containingShadowRoot();
     if (root && root->type() == ShadowRoot::ClosedShadowRoot)
         return true;
 
     return false;
 }
 
-void StyleElement::createSheet(Element* e, const String& text)
+StyleElement::ProcessingResult StyleElement::createSheet(Element* e, const String& text)
 {
     ASSERT(e);
     ASSERT(e->inDocument());
     Document& document = e->document();
     if (m_sheet)
         clearSheet(e);
 
     const ContentSecurityPolicy* csp = document.contentSecurityPolicy();
     bool passesContentSecurityPolicyChecks = shouldBypassMainWorldCSP(e)
         || csp->allowStyleWithHash(text)
@@ skipping 11 matching lines @@
             m_loading = true;
             TextPosition startPosition = m_startPosition == TextPosition::belowRangePosition() ? TextPosition::minimumPosition() : m_startPosition;
             m_sheet = document.styleEngine().createSheet(e, text, startPosition, m_createdByParser);
             m_sheet->setMediaQueries(mediaQueries.release());
             m_loading = false;
         }
     }
 
     if (m_sheet)
         m_sheet->contents()->checkLoaded();
+
+    return passesContentSecurityPolicyChecks ? ProcessingSuccessful : ProcessingFatalError;
 }
 
 bool StyleElement::isLoading() const
 {
     if (m_loading)
         return true;
     return m_sheet ? m_sheet->isLoading() : false;
 }
 
 bool StyleElement::sheetLoaded(Document& document)
 {
     if (isLoading())
         return false;
 
     document.styleEngine().removePendingSheet(m_sheet->ownerNode());
     return true;
 }
 
 void StyleElement::startLoadingDynamicSheet(Document& document)
 {
     document.styleEngine().addPendingSheet();
 }
 
 DEFINE_TRACE(StyleElement)
 {
     visitor->trace(m_sheet);
 }
 
 }