Change wxWebRequest and related objects to hide ref counting

Don't force the application code to deal with wxObjectDataPtr<> or,
worse, calling {Inc,Dec}Ref() manually by hiding it inside the wx
objects themselves and giving the value-like semantics to them.

There should be no real changes in the behaviour, but the API does
change significantly. Notably, wxWebRequest is not a wxEvtHandler itself
any longer, as this would be incompatible with the value semantics, and
an event handler needs to be specified when creating it, so that it
could be notified about the request state changes.

include/wx/msw/private/webrequest_winhttp.h

@@ -19,7 +19,7 @@
 class wxWebSessionWinHTTP;
 class wxWebRequestWinHTTP;
 
-class WXDLLIMPEXP_NET wxWebResponseWinHTTP : public wxWebResponse
+class wxWebResponseWinHTTP : public wxWebResponseImpl
 {
 public:
     wxWebResponseWinHTTP(wxWebRequestWinHTTP& request);
@@ -45,10 +45,11 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxWebResponseWinHTTP);
 };
 
-class WXDLLIMPEXP_NET wxWebAuthChallengeWinHTTP : public wxWebAuthChallenge
+class wxWebAuthChallengeWinHTTP : public wxWebAuthChallengeImpl
 {
 public:
-    wxWebAuthChallengeWinHTTP(Source source, wxWebRequestWinHTTP& request);
+    wxWebAuthChallengeWinHTTP(wxWebAuthChallenge::Source source,
+                              wxWebRequestWinHTTP& request);
 
     bool Init();
 
@@ -62,10 +63,14 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxWebAuthChallengeWinHTTP);
 };
 
-class WXDLLIMPEXP_NET wxWebRequestWinHTTP : public wxWebRequest
+class wxWebRequestWinHTTP : public wxWebRequestImpl
 {
 public:
-    wxWebRequestWinHTTP(int id, wxWebSessionWinHTTP& session, const wxString& url);
+    wxWebRequestWinHTTP(wxWebSession& session,
+                        wxWebSessionWinHTTP& sessionWinHTTP,
+                        wxEvtHandler* handler,
+                        const wxString& url,
+                        int id);
 
     ~wxWebRequestWinHTTP();
 
@@ -73,9 +78,11 @@ public:
 
     void Cancel() wxOVERRIDE;
 
-    wxWebResponse* GetResponse() const wxOVERRIDE;
+    wxWebResponseImplPtr GetResponse() const wxOVERRIDE
+        { return m_response; }
 
-    wxWebAuthChallenge* GetAuthChallenge() const wxOVERRIDE { return m_authChallenge.get(); }
+    wxWebAuthChallengeImplPtr GetAuthChallenge() const wxOVERRIDE
+        { return m_authChallenge; }
 
     wxFileOffset GetBytesSent() const wxOVERRIDE { return m_dataWritten; }
 
@@ -87,11 +94,12 @@ public:
     HINTERNET GetHandle() const { return m_request; }
 
 private:
+    wxWebSessionWinHTTP& m_sessionWinHTTP;
     wxString m_url;
     HINTERNET m_connect;
     HINTERNET m_request;
-    wxScopedPtr<wxWebResponseWinHTTP> m_response;
-    wxScopedPtr<wxWebAuthChallengeWinHTTP> m_authChallenge;
+    wxObjectDataPtr<wxWebResponseWinHTTP> m_response;
+    wxObjectDataPtr<wxWebAuthChallengeWinHTTP> m_authChallenge;
     wxMemoryBuffer m_dataWriteBuffer;
     wxFileOffset m_dataWritten;
 
@@ -108,14 +116,18 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxWebRequestWinHTTP);
 };
 
-class WXDLLIMPEXP_NET wxWebSessionWinHTTP : public wxWebSession
+class wxWebSessionWinHTTP : public wxWebSessionImpl
 {
 public:
     wxWebSessionWinHTTP();
 
     ~wxWebSessionWinHTTP();
 
-    wxWebRequest* CreateRequest(const wxString& url, int id = wxID_ANY) wxOVERRIDE;
+    wxWebRequestImplPtr
+    CreateRequest(wxWebSession& session,
+                  wxEvtHandler* handler,
+                  const wxString& url,
+                  int id) wxOVERRIDE;
 
     wxVersionInfo GetLibraryVersionInfo() wxOVERRIDE;
 
@@ -130,10 +142,10 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxWebSessionWinHTTP);
 };
 
-class WXDLLIMPEXP_NET wxWebSessionFactoryWinHTTP : public wxWebSessionFactory
+class wxWebSessionFactoryWinHTTP : public wxWebSessionFactory
 {
 public:
-    wxWebSession* Create() wxOVERRIDE
+    wxWebSessionImpl* Create() wxOVERRIDE
         { return new wxWebSessionWinHTTP(); }
 };