urlmon: Move some HttpProtocol variables to generic Protocol object.

dlls/urlmon/urlmon_main.h

 /*
  * Copyright 2002 Huw D M Davies for CodeWeavers
+ * Copyright 2009 Jacek Caban for CodeWeavers
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -30,6 +31,7 @@
 #include "winuser.h"
 #include "ole2.h"
 #include "urlmon.h"
+#include "wininet.h"
 
 #include "wine/unicode.h"
 
@@ -50,7 +52,8 @@ static inline void URLMON_LockModule(void) { InterlockedIncrement( &URLMON_refCo
 static inline void URLMON_UnlockModule(void) { InterlockedDecrement( &URLMON_refCount ); }
 
 #define ICOM_THIS_MULTI(impl,field,iface) impl* const This=(impl*)((char*)(iface) - offsetof(impl,field))
-#define DEFINE_THIS(cls,ifc,iface) ((cls*)((BYTE*)(iface)-offsetof(cls,lp ## ifc ## Vtbl)))
+#define DEFINE_THIS2(cls,ifc,iface) ((cls*)((BYTE*)(iface)-offsetof(cls,ifc)))
+#define DEFINE_THIS(cls,ifc,iface) DEFINE_THIS2(cls,lp ## ifc ## Vtbl,iface)
 
 typedef struct
 {	
@@ -76,6 +79,25 @@ HRESULT bind_to_object(IMoniker *mon, LPCWSTR url, IBindCtx *pbc, REFIID riid, v
 HRESULT create_binding_protocol(LPCWSTR url, BOOL from_urlmon, IInternetProtocol **protocol);
 void set_binding_sink(IInternetProtocol *bind_protocol, IInternetProtocolSink *sink);
 
+typedef struct {
+    IInternetProtocol *protocol;
+    IInternetProtocolSink *protocol_sink;
+
+    DWORD bindf;
+    BINDINFO bind_info;
+
+    HINTERNET internet;
+    HINTERNET request;
+    DWORD flags;
+    HANDLE lock;
+
+    ULONG current_position;
+    ULONG content_length;
+    ULONG available_bytes;
+
+    LONG priority;
+} Protocol;
+
 static inline void *heap_alloc(size_t len)
 {
     return HeapAlloc(GetProcessHeap(), 0, len);