Oilpan: Prepare moving InspectorController and InspectorAgents to oilpan.

Source/core/inspector/InspectorPageAgent.h

Index: Source/core/inspector/InspectorPageAgent.h
diff --git a/Source/core/inspector/InspectorPageAgent.h b/Source/core/inspector/InspectorPageAgent.h
index b8c0c0c80de965249f570a38ec17a52a7e4148b2..2e25338ae9517e0ca259d4a98412e114ad620204 100644
--- a/Source/core/inspector/InspectorPageAgent.h
+++ b/Source/core/inspector/InspectorPageAgent.h
@@ -78,7 +78,7 @@ public:
         OtherResource
     };
 
-    static PassOwnPtr<InspectorPageAgent> create(Page*, InjectedScriptManager*, InspectorClient*, InspectorOverlay*);
+    static PassOwnPtrWillBeRawPtr<InspectorPageAgent> create(Page*, InjectedScriptManager*, InspectorClient*, InspectorOverlay*);
 
     // Settings overrides.
     void setTextAutosizingEnabled(bool);
@@ -166,6 +166,8 @@ public:
     static DocumentLoader* assertDocumentLoader(ErrorString*, LocalFrame*);
     InspectorResourceContentLoader* resourceContentLoader() { return m_inspectorResourceContentLoader.get(); }
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 private:
     class GetResourceContentLoadListener;
 
@@ -182,7 +184,8 @@ private:
 
     PassRefPtr<TypeBuilder::Page::Frame> buildObjectForFrame(LocalFrame*);
     PassRefPtr<TypeBuilder::Page::FrameResourceTree> buildObjectForFrameTree(LocalFrame*);
-    Page* m_page;
+    RawPtrWillBeMember<Page> m_page;
+    // FIXME: Oilpan: Move InjectedScriptManager to heap in follow-up CL.
     InjectedScriptManager* m_injectedScriptManager;
     InspectorClient* m_client;
     InspectorFrontend::Page* m_frontend;