Changes to write various registry keys as required by Omaha for Windows Cloud Print Virtual Driver.

cloud_print/virtual_driver/win/port_monitor/port_monitor.cc

Index: cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
diff --git a/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc b/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
index 562d0b8dea617b4b4ac3d32929d46b3c981eccd7..c6f1688fd2ef3759864f6751022e1772ae1ee971 100644
--- a/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
+++ b/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
@@ -380,6 +380,16 @@ BOOL WINAPI Monitor2StartDocPort(HANDLE port_handle,
                                  DWORD,
                                  BYTE*) {
   LOG(INFO) << "Monitor2StartDocPort";
+  const wchar_t* kUsageKey = L"dr";
+  // Set appropriate key to 1 to let Omaha record usage.
+  base::win::RegKey key;
+  if (key.Create(HKEY_CURRENT_USER, kKeyLocation,
+                 KEY_ALL_ACCESS) != ERROR_SUCCESS) {

[sanjeevr, 2011/08/03 11:19:29]

You only need KEY_SET_VALUE.

[abeera, 2011/08/03 19:50:30]

Done.

+    LOG(ERROR) << "Unable to open key to log usage";
+  }
+  if (key.WriteValue(kUsageKey, L"1") != ERROR_SUCCESS) {
+    LOG(ERROR) << "Unable to set usage key";
+  }
   if (port_handle == NULL) {
     LOG(ERROR) << "port_handle should not be NULL.";
     SetLastError(ERROR_INVALID_PARAMETER);