Merge 130511 - Web Inspector: [Styles] Unable to edit properties in broken stylesheets

Source/WebCore/css/CSSParser.cpp

Index: Source/WebCore/css/CSSParser.cpp
===================================================================
--- Source/WebCore/css/CSSParser.cpp	(revision 131160)
+++ Source/WebCore/css/CSSParser.cpp	(working copy)
@@ -9986,6 +9986,7 @@
         return 0;
 
     ASSERT(!m_currentRuleDataStack->isEmpty());
+    m_currentRuleData.clear();
     RefPtr<CSSRuleSourceData> data = m_currentRuleDataStack->last();
     m_currentRuleDataStack->removeLast();
     return data.release();
@@ -10290,8 +10291,14 @@
 {
     if (!isExtractingSourceData())
         return;
+
+    // Pop off data for a previous invalid rule.
+    if (m_currentRuleData)
+        m_currentRuleDataStack->removeLast();
+
     RefPtr<CSSRuleSourceData> data = CSSRuleSourceData::create(ruleType);
     data->ruleHeaderRange.start = tokenStartOffset();
+    m_currentRuleData = data;
     m_currentRuleDataStack->append(data.release());
 }
 
@@ -10325,6 +10332,7 @@
 {
     if (!isExtractingSourceData())
         return;
+    m_currentRuleData.clear();
     unsigned offset = tokenStartOffset();
     if (tokenStartChar() == '{')
         ++offset; // Skip the rule body opening brace.