DevTools: Track CSSStyleSheetHeaders in the front-end real time

Source/core/inspector/InspectorInstrumentation.cpp

Index: Source/core/inspector/InspectorInstrumentation.cpp
diff --git a/Source/core/inspector/InspectorInstrumentation.cpp b/Source/core/inspector/InspectorInstrumentation.cpp
index 6a62da913bb96cc85998b4cfc9cf56b0c6fe0b61..3efd4aeee13f1553f5b2e5958e7333772cb74677 100644
--- a/Source/core/inspector/InspectorInstrumentation.cpp
+++ b/Source/core/inspector/InspectorInstrumentation.cpp
@@ -230,6 +230,12 @@ void InspectorInstrumentation::didInvalidateStyleAttrImpl(InstrumentingAgents* i
         domDebuggerAgent->didInvalidateStyleAttr(node);
 }
 
+void InspectorInstrumentation::activeStyleSheetsUpdatedImpl(InstrumentingAgents* instrumentingAgents, const Vector<RefPtr<StyleSheet> >& newSheets)
+{
+    if (InspectorCSSAgent* cssAgent = instrumentingAgents->inspectorCSSAgent())
+        cssAgent->activeStyleSheetsUpdated(newSheets);
+}
+
 void InspectorInstrumentation::frameWindowDiscardedImpl(InstrumentingAgents* instrumentingAgents, DOMWindow* window)
 {
     if (InspectorConsoleAgent* consoleAgent = instrumentingAgents->inspectorConsoleAgent())