Use RecalcStyleDeferred for inspector style changes.

Source/core/inspector/InspectorStyleSheet.cpp

 /*
  * Copyright (C) 2010, 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 982 matching lines @@
         m_pageStyleSheet->clearChildRuleCSSOMWrappers();
     }
     {
         CSSStyleSheet::RuleMutationScope mutationScope(m_pageStyleSheet.get());
         m_pageStyleSheet->contents()->parseString(text);
     }
 
     if (listener())
         listener()->didReparseStyleSheet();
     fireStyleSheetChanged();
-    m_pageStyleSheet->ownerDocument()->styleResolverChanged(RecalcStyleImmediately, FullStyleUpdate);
+    m_pageStyleSheet->ownerDocument()->styleResolverChanged(RecalcStyleDeferred, FullStyleUpdate);

[vsevik, 2014/05/19 09:32:39]

This is needed to make sure StyleSheetAdded/Removed events are dispatched inside
setText  processing in case setText changes @import in stylesheet.
We need to evaluate possible consequences of this change,

     return true;
 }
 
 String InspectorStyleSheet::ruleSelector(const InspectorCSSId& id, ExceptionState& exceptionState)
 {
     CSSStyleRule* rule = ruleForId(id);
     if (!rule) {
         exceptionState.throwDOMException(NotFoundError, "No rule was found for the given ID.");
         return "";
     }
@@ skipping 651 matching lines @@
 
     RefPtrWillBeRawPtr<MutableStylePropertySet> tempDeclaration = MutableStylePropertySet::create();
     RuleSourceDataList ruleSourceDataResult;
     StyleSheetHandler handler(m_styleText, &m_element->document(), m_element->document().elementSheet().contents(), &ruleSourceDataResult);
     BisonCSSParser(parserContextForDocument(&m_element->document())).parseDeclaration(tempDeclaration.get(), m_styleText, &handler, m_element->document().elementSheet().contents());
     return ruleSourceDataResult.first().release();
 }
 
 } // namespace WebCore