Enable EULA dialog to be shown from metro Chrome.

chrome/installer/util/install_util.cc

Index: chrome/installer/util/install_util.cc
diff --git a/chrome/installer/util/install_util.cc b/chrome/installer/util/install_util.cc
index 6b327f8e29378b2e05ae102b5d49c9baa01cd3b5..0c1dd99c9315b6989bdb3b4e610eeb0504440252 100644
--- a/chrome/installer/util/install_util.cc
+++ b/chrome/installer/util/install_util.cc
@@ -26,6 +26,7 @@
 #include "base/win/windows_version.h"
 #include "chrome/installer/util/browser_distribution.h"
 #include "chrome/installer/util/google_update_constants.h"
+#include "chrome/installer/util/helper.h"
 #include "chrome/installer/util/l10n_string_util.h"
 #include "chrome/installer/util/installation_state.h"
 #include "chrome/installer/util/util_constants.h"
@@ -358,6 +359,29 @@ bool InstallUtil::HasDelegateExecuteHandler(BrowserDistribution* dist,
   return found;
 }
 
+bool InstallUtil::GetSentinelFilePath(const char* file,
+                                      BrowserDistribution* dist,
+                                      FilePath* path) {
+  FilePath exe_path;
+  if (!PathService::Get(base::DIR_EXE, &exe_path))
+    return false;
+
+  if (IsPerUserInstall(exe_path.value().c_str())) {
+    *path = exe_path;
+  } else {
+    std::vector<FilePath> user_data_dir_paths;
+    installer::GetChromeUserDataPaths(dist, &user_data_dir_paths);
+
+    if (!user_data_dir_paths.empty())
+      *path = user_data_dir_paths[0];
+    else
+      return false;
+  }
+
+  *path = path->AppendASCII(file);
+  return true;
+}
+
 // This method tries to delete a registry key and logs an error message
 // in case of failure. It returns true if deletion is successful (or the key did
 // not exist), otherwise false.