Re-enable building both 32 and 64 bit version of the GCP port monitor.

cloud_print/virtual_driver/win/virtual_driver_helpers.h

Index: cloud_print/virtual_driver/win/virtual_driver_helpers.h
diff --git a/cloud_print/virtual_driver/win/virtual_driver_helpers.h b/cloud_print/virtual_driver/win/virtual_driver_helpers.h
index eadebe8d40edc83ec0c4518c41499d9d7c82395a..e389d5cff2d0e0a5fac83bc7376ccbd78c3a4346 100644
--- a/cloud_print/virtual_driver/win/virtual_driver_helpers.h
+++ b/cloud_print/virtual_driver/win/virtual_driver_helpers.h
@@ -20,9 +20,15 @@ void DisplayWindowsMessage(HWND hwnd,
                            HRESULT hr,
                            const base::string16& caption);
 
+// Returns the correct port monitor DLL file name for the current machine.
+base::string16 GetPortMonitorDllName();
+
 // Gets the standard install path for "version 3" print drivers.
 HRESULT GetPrinterDriverDir(base::FilePath* path);
 
+// Returns TRUE if the current OS is 64 bit.
+bool IsSystem64Bit();
+
 }  // namespace cloud_print
 
 #endif  // CLOUD_PRINT_VIRTUAL_DRIVER_WIN_VIRTUAL_DRIVER_HELPERS_H_