Adding simple Chrome install testing using multi-install and cleaning up a bit.

chrome/test/mini_installer_test/run_all_unittests.cc

Index: chrome/test/mini_installer_test/run_all_unittests.cc
diff --git a/chrome/test/mini_installer_test/run_all_unittests.cc b/chrome/test/mini_installer_test/run_all_unittests.cc
index dd9274a8a810e73e66d154f43552067e5d15b87d..4e728446231fc274ddce6f1d3ea78d93bcd0b270 100644
--- a/chrome/test/mini_installer_test/run_all_unittests.cc
+++ b/chrome/test/mini_installer_test/run_all_unittests.cc
@@ -18,10 +18,9 @@ void BackUpProfile(bool chrome_frame) {
            "Please close Chrome and run the tests again.\n");
     exit(1);
   }
-  ChromeMiniInstaller installer(mini_installer_constants::kUserInstall,
-                                chrome_frame);
-  FilePath path =
-      FilePath::FromWStringHack(installer.GetChromeInstallDirectoryLocation());
+  ChromeMiniInstaller installer(false, chrome_frame);
+  FilePath path;
+  installer.GetChromeInstallDirectoryLocation(&path);
   path = path.Append(mini_installer_constants::kChromeAppDir).DirName();
   FilePath backup_path = path;
   // Will hold User Data path that needs to be backed-up.