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 4211d39e21ea2ae07b330c0ef47ec3b0c2c18254..0f303d5cec2737b13bdf864ad4d4c5434f5e1270 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);
@@ -165,6 +165,8 @@ public:
     static DocumentLoader* assertDocumentLoader(ErrorString*, LocalFrame*);
     InspectorResourceContentLoader* resourceContentLoader() { return m_inspectorResourceContentLoader.get(); }
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 private:
     static void resourceContent(ErrorString*, LocalFrame*, const KURL&, String* result, bool* base64Encoded);
 
@@ -179,7 +181,8 @@ 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;