[cros mp] Load profiles from /home/chronos/u-[$hash], add GetUserIdHashFromProfile()

chrome/browser/chromeos/extensions/networking_private_apitest.cc

Index: chrome/browser/chromeos/extensions/networking_private_apitest.cc
diff --git a/chrome/browser/chromeos/extensions/networking_private_apitest.cc b/chrome/browser/chromeos/extensions/networking_private_apitest.cc
index d5e57b029c745fe4e5c16b7466fc3ad3ab4d0b1f..71cff2f96a033ab0e58e6f7afc1ee450d35945e7 100644
--- a/chrome/browser/chromeos/extensions/networking_private_apitest.cc
+++ b/chrome/browser/chromeos/extensions/networking_private_apitest.cc
@@ -34,6 +34,7 @@ namespace chromeos {
 namespace {
 
 const char kUser1ProfilePath[] = "/profile/user1/shill";
+const char kUserIdStubHashSuffix[] = "-hash";
 
 void AssignString(std::string* out,
                   DBusMethodCallStatus call_status,
@@ -58,7 +59,7 @@ class ExtensionNetworkingPrivateApiTest : public ExtensionApiTest {
     std::string login_user =
         command_line->GetSwitchValueNative(switches::kLoginUser);
     // Do the same as CryptohomeClientStubImpl::GetSanitizedUsername
-    std::string sanitized_user = login_user + "-profile";
+    std::string sanitized_user = login_user + kUserIdStubHashSuffix;
     command_line->AppendSwitchASCII(switches::kLoginProfile, sanitized_user);
   }