Moved Google Update and install related code to cloud_print/common

cloud_print/common/win/cloud_print_utils.cc

Index: cloud_print/common/win/cloud_print_utils.cc
diff --git a/cloud_print/common/win/cloud_print_utils.cc b/cloud_print/common/win/cloud_print_utils.cc
index 5816b64457dcbf2d1f05e50e86ee11b047f07fae..71c9b53e7859a80da5a97fbfa6b128fb4b0eb740 100644
--- a/cloud_print/common/win/cloud_print_utils.cc
+++ b/cloud_print/common/win/cloud_print_utils.cc
@@ -6,8 +6,18 @@
 
 #include <windows.h>
 
+#include "base/win/registry.h"
+
 namespace cloud_print {
 
+namespace {
+
+// Google Update related constants.
+const wchar_t kClientStateKey[] = L"SOFTWARE\\Google\\Update\\ClientState\\";
+const wchar_t* kUsageKey = L"dr";
+
+}  // namespace
+
 HRESULT GetLastHResult() {
   DWORD error_code = GetLastError();
   return error_code ? HRESULT_FROM_WIN32(error_code) : E_FAIL;
@@ -37,4 +47,15 @@ string16 GetErrorMessage(HRESULT hr) {
   return result;
 }
 
+void SetGoogleUpdateUsage(const string16& product_id) {
+  // Set appropriate key to 1 to let Omaha record usage.
+  base::win::RegKey key;
+  if (key.Create(HKEY_CURRENT_USER,
+                 (kClientStateKey + product_id).c_str(),
+                 KEY_SET_VALUE) != ERROR_SUCCESS ||
+      key.WriteValue(kUsageKey, L"1") != ERROR_SUCCESS) {
+    LOG(ERROR) << "Unable to set usage key";
+  }
+}
+
 }  // namespace cloud_print