Use shared pointers to hold wxWebHandlers throughout.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68605 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/webview.h

@@ -339,7 +339,7 @@ public:
     virtual void Redo() = 0;
 
     //Virtual Filesystem Support
-    virtual void RegisterHandler(wxWebHandler* handler) = 0;
+    virtual void RegisterHandler(wxSharedPtr<wxWebHandler> handler) = 0;
 
     wxDECLARE_ABSTRACT_CLASS(wxWebView);
 };