Factor out logic to find chrome.exe from Omaha client state.

cloud_print/service/win/cloud_print_service.cc

Index: cloud_print/service/win/cloud_print_service.cc
diff --git a/cloud_print/service/win/cloud_print_service.cc b/cloud_print/service/win/cloud_print_service.cc
index f87c288850ad72a29c8cfb78df1245d475622ab7..6218f15a2fa9170addaac2e8dfcab2a102c5443e 100644
--- a/cloud_print/service/win/cloud_print_service.cc
+++ b/cloud_print/service/win/cloud_print_service.cc
@@ -15,6 +15,7 @@
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/win/scoped_handle.h"
+#include "chrome/tools/launcher_support/chrome_launcher_support.h"
 #include "cloud_print/service/service_state.h"
 #include "cloud_print/service/service_switches.h"
 #include "cloud_print/service/win/chrome_launcher.h"
@@ -188,7 +189,8 @@ class CloudPrintServiceModule
     if (FAILED(hr))
       return hr;

[Vitaly Buka (NO REVIEWS), 2012/06/13 18:01:36]

you can put 
"using namespace chrome_launcher_support;"

[erikwright (departed), 2012/06/13 19:43:43]

Done.

 
-    if (ChromeLauncher::GetChromePath(HKEY_LOCAL_MACHINE).empty()) {
+    if (chrome_launcher_support::GetChromePathForInstallationLevel(
+            chrome_launcher_support::SYSTEM_LEVEL_INSTALLATION).empty()) {
       LOG(ERROR) << "Found no Chrome installed for all users.";
       return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
     }