[DevTools] Reverse dependencies between InspectorOverlay and agents.

Source/core/inspector/InspectorDOMAgent.h

Index: Source/core/inspector/InspectorDOMAgent.h
diff --git a/Source/core/inspector/InspectorDOMAgent.h b/Source/core/inspector/InspectorDOMAgent.h
index b2a2bcfb271985872668e1b00f423759b39bc6c5..514e2046e8f3e0cdb8c68e14a426372e5149224b 100644
--- a/Source/core/inspector/InspectorDOMAgent.h
+++ b/Source/core/inspector/InspectorDOMAgent.h
@@ -38,6 +38,7 @@
 #include "core/inspector/InspectorBaseAgent.h"
 #include "core/style/ComputedStyleConstants.h"
 #include "platform/JSONValues.h"
+#include "platform/geometry/FloatQuad.h"
 
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
@@ -60,7 +61,6 @@ class FloatQuad;
 class InsertionPoint;
 class InspectorFrontend;
 class InspectorHistory;
-class InspectorOverlay;
 class InspectorPageAgent;
 class Node;
 class QualifiedName;
@@ -87,9 +87,18 @@ public:
         virtual void didModifyDOMAttr(Element*) = 0;
     };
 
-    static PassOwnPtrWillBeRawPtr<InspectorDOMAgent> create(InspectorPageAgent* pageAgent, InjectedScriptManager* injectedScriptManager, InspectorOverlay* overlay)
+    class Client {
+    public:
+        virtual ~Client() { }
+        virtual void setInspectModeEnabled(bool) { }
+        virtual void hideHighlight() { }
+        virtual void highlightNode(Node*, Node* eventTarget, const InspectorHighlightConfig&, bool omitTooltip) { }
+        virtual void highlightQuad(PassOwnPtr<FloatQuad>, const InspectorHighlightConfig&) { }
+    };
+
+    static PassOwnPtrWillBeRawPtr<InspectorDOMAgent> create(InspectorPageAgent* pageAgent, InjectedScriptManager* injectedScriptManager, Client* client)
     {
-        return adoptPtrWillBeNoop(new InspectorDOMAgent(pageAgent, injectedScriptManager, overlay));
+        return adoptPtrWillBeNoop(new InspectorDOMAgent(pageAgent, injectedScriptManager, client));
     }
 
     static String toErrorString(ExceptionState&);
@@ -198,7 +207,7 @@ public:
 private:
     enum SearchMode { NotSearching, SearchingForNormal, SearchingForUAShadow };
 
-    InspectorDOMAgent(InspectorPageAgent*, InjectedScriptManager*, InspectorOverlay*);
+    InspectorDOMAgent(InspectorPageAgent*, InjectedScriptManager*, Client*);
 
     void setDocument(Document*);
     void innerEnable();
@@ -240,7 +249,7 @@ private:
 
     RawPtrWillBeMember<InspectorPageAgent> m_pageAgent;
     RawPtrWillBeMember<InjectedScriptManager> m_injectedScriptManager;
-    RawPtrWillBeMember<InspectorOverlay> m_overlay;
+    Client* m_client;
     RawPtrWillBeMember<DOMListener> m_domListener;
     OwnPtrWillBeMember<NodeToIdMap> m_documentNodeToIdMap;
     // Owns node mappings for dangling nodes.