Add support for device removal/arrival detection with device type. For now this allows us to detect…

content/browser/system_message_window_win.h

Index: content/browser/system_message_window_win.h
diff --git a/content/browser/system_message_window_win.h b/content/browser/system_message_window_win.h
index fefb4ce20d4245ebfd06e275002d429753e92825..d9df17c4056ff624cd73f7d77cd75780e2f05b1f 100644
--- a/content/browser/system_message_window_win.h
+++ b/content/browser/system_message_window_win.h
@@ -8,6 +8,7 @@
 #include <windows.h>
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
 
 class CONTENT_EXPORT SystemMessageWindowWin {
@@ -16,7 +17,7 @@ class CONTENT_EXPORT SystemMessageWindowWin {
 
   virtual ~SystemMessageWindowWin();
 
-  virtual LRESULT OnDeviceChange(UINT event_type, DWORD data);
+  virtual LRESULT OnDeviceChange(UINT event_type, DWORD_PTR data);
 
  private:
   void Init();
@@ -37,6 +38,8 @@ class CONTENT_EXPORT SystemMessageWindowWin {
 
   HMODULE instance_;
   HWND window_;
+  class DeviceNotifications;
+  scoped_ptr<DeviceNotifications> device_notifications_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemMessageWindowWin);
 };