Oilpan: Prepare moving InspectorFrontendHost to Oilpan

Source/core/inspector/InspectorFrontendClient.h

Index: Source/core/inspector/InspectorFrontendClient.h
diff --git a/Source/core/inspector/InspectorFrontendClient.h b/Source/core/inspector/InspectorFrontendClient.h
index ca2b8bd4ac74eba1d485ebc6bc5719ce8ccae86e..99529c7155b900198d58f6ef4e8fdda4657c199f 100644
--- a/Source/core/inspector/InspectorFrontendClient.h
+++ b/Source/core/inspector/InspectorFrontendClient.h
@@ -31,15 +31,18 @@
 #ifndef InspectorFrontendClient_h
 #define InspectorFrontendClient_h
 
+#include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
-class InspectorFrontendClient {
+class InspectorFrontendClient : public NoBaseWillBeGarbageCollectedFinalized<InspectorFrontendClient> {
 public:
     virtual ~InspectorFrontendClient() { }
 
+    virtual void trace(Visitor*) { }
+
     virtual void windowObjectCleared() = 0;
 
     virtual void sendMessageToBackend(const String&) = 0;
@@ -47,6 +50,8 @@ public:
     virtual void sendMessageToEmbedder(const String&) = 0;
 
     virtual bool isUnderTest() = 0;
+
+    virtual void dispose() = 0;
 };
 
 } // namespace blink