Do not show the EULA if it has already been accepted by the user in another user data dir.

chrome/browser/first_run/first_run_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/first_run/first_run.h"
 
 #include <shlobj.h>
 #include <windows.h>
 
 #include "base/environment.h"
@@ skipping 153 matching lines @@
 
   // TODO(evan): should this use options.wait = true?
   if (!base::LaunchProcess(cl, base::LaunchOptions(), &ph))
     return false;
   DWORD wr = ::WaitForSingleObject(ph, INFINITE);
   if (wr != WAIT_OBJECT_0)
     return false;
   return (TRUE == ::GetExitCodeProcess(ph, reinterpret_cast<DWORD*>(ret_code)));
 }
 
+// Returns true if the EULA is required but has not been accepted by this user.
+// The EULA is considered having been accepted if the user has gotten past
+// first run in the "other" environment (desktop or metro).
+bool IsEulaNotAccepted(installer::MasterPreferences* install_prefs) {
+  bool value = false;
+  if (install_prefs->GetBool(installer::master_preferences::kRequireEula,
+          &value) && value) {
+    // Check for a first run sentinel in the alternate user data dir.
+    FilePath alt_user_data_dir;
+    if (!PathService::Get(chrome::DIR_ALT_USER_DATA, &alt_user_data_dir) ||
+        !file_util::DirectoryExists(alt_user_data_dir) ||
+        !file_util::PathExists(alt_user_data_dir.AppendASCII(
+            first_run::internal::kSentinelFile))) {
+      return true;
+    }
+  }
+  return false;
+}
+
 // Writes the EULA to a temporary file, returned in |*eula_path|, and returns
 // true if successful.
 bool WriteEULAtoTempFile(FilePath* eula_path) {
   base::StringPiece terms =
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_TERMS_HTML, ui::SCALE_FACTOR_NONE);
   if (terms.empty())
     return false;
   FILE *file = file_util::CreateAndOpenTemporaryFile(eula_path);
   if (!file)
     return false;
   bool good = fwrite(terms.data(), terms.size(), 1, file) == 1;
   fclose(file);
   return good;
 }
 
 void ShowPostInstallEULAIfNeeded(installer::MasterPreferences* install_prefs) {
-  bool value = false;
-  if (install_prefs->GetBool(installer::master_preferences::kRequireEula,
-          &value) && value) {
+  if (IsEulaNotAccepted(install_prefs)) {
     // Show the post-installation EULA. This is done by setup.exe and the
     // result determines if we continue or not. We wait here until the user
     // dismisses the dialog.
 
     // The actual eula text is in a resource in chrome. We extract it to
     // a text file so setup.exe can use it as an inner frame.
     FilePath inner_html;
     if (WriteEULAtoTempFile(&inner_html)) {
       int retcode = 0;
       if (!LaunchSetupWithParam(installer::switches::kShowEula,
@@ skipping 382 matching lines @@
     return false;
 
   internal::SetShowWelcomePagePrefIfNeeded(install_prefs.get());
   internal::SetImportPreferencesAndLaunchImport(out_prefs, install_prefs.get());
   internal::SetDefaultBrowser(install_prefs.get());
 
   return false;
 }
 
 }  // namespace first_run