Merge 149874 "DevTools: Do not unbind stylesheets in multiframe ..."

Source/core/inspector/InspectorCSSAgent.cpp

Index: Source/core/inspector/InspectorCSSAgent.cpp
===================================================================
--- Source/core/inspector/InspectorCSSAgent.cpp	(revision 150193)
+++ Source/core/inspector/InspectorCSSAgent.cpp	(working copy)
@@ -736,11 +736,11 @@
     m_frontend->regionLayoutUpdated(buildObjectForNamedFlow(&errorString, namedFlow, documentNodeId));
 }
 
-void InspectorCSSAgent::activeStyleSheetsUpdated(const Vector<RefPtr<StyleSheet> >& newSheets)
+void InspectorCSSAgent::activeStyleSheetsUpdated(Document* document, const Vector<RefPtr<StyleSheet> >& newSheets)
 {
     HashSet<CSSStyleSheet*> removedSheets;
     for (CSSStyleSheetToInspectorStyleSheet::iterator it = m_cssStyleSheetToInspectorStyleSheet.begin(); it != m_cssStyleSheetToInspectorStyleSheet.end(); ++it) {
-        if (it->value->canBind())
+        if (it->value->canBind() && (!it->key->ownerDocument() || it->key->ownerDocument() == document))
             removedSheets.add(it->key);
     }
 
@@ -782,6 +782,15 @@
     }
 }
 
+void InspectorCSSAgent::frameDetachedFromParent(Frame* frame)
+{
+    Document* document = frame->document();
+    if (!document)
+        return;
+    Vector<RefPtr<StyleSheet> > newSheets;
+    activeStyleSheetsUpdated(document, newSheets);
+}
+
 bool InspectorCSSAgent::forcePseudoState(Element* element, CSSSelector::PseudoType pseudoType)
 {
     if (m_nodeIdToForcedPseudoState.isEmpty())