Use InstallDetails in installer_util.

chrome/installer/util/install_util.h

Index: chrome/installer/util/install_util.h
diff --git a/chrome/installer/util/install_util.h b/chrome/installer/util/install_util.h
index 198d3385359faf09bd6a98dbc87ed715fcf2cbd1..8022c8a3133de17e8669a3cc6629c641b55814fe 100644
--- a/chrome/installer/util/install_util.h
+++ b/chrome/installer/util/install_util.h
@@ -88,10 +88,6 @@ class InstallUtil {
   // Files).

[gab, 2017/02/14 16:57:56]

Deprecated comment + TODO to remove.

[grt (UTC plus 2), 2017/02/14 21:04:24]

I'm on the fence as to whether or not this should stay around as a convenience
function for InstallDetails. TODO added.

   static bool IsPerUserInstall(const base::FilePath& exe_path);
 
-  // Resets internal state for IsPerUserInstall so that the next call recomputes
-  // with fresh data.
-  static void ResetIsPerUserInstallForTest();
-
   // Returns true if this is running setup process for Chrome SxS (as
   // indicated by the presence of --chrome-sxs on the command line) or if this
   // is running Chrome process from the Chrome SxS installation (as indicated