Use multi-profile mount point by default after browser crash and in Guest session.

chrome/common/logging_chrome.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 "build/build_config.h"
 
 // Need to include this before most other files because it defines
 // IPC_MESSAGE_LOG_ENABLED. We need to use it to define
 // IPC_MESSAGE_MACROS_LOG_ENABLED so render_messages.h will generate the
 // ViewMsgLog et al. functions.
@@ skipping 189 matching lines @@
 base::FilePath GetSessionLogFile(const CommandLine& command_line) {
   base::FilePath log_dir;
   std::string log_dir_str;
   scoped_ptr<base::Environment> env(base::Environment::Create());
   if (env->GetVar(env_vars::kSessionLogDir, &log_dir_str) &&
       !log_dir_str.empty()) {
     log_dir = base::FilePath(log_dir_str);
   } else if (command_line.HasSwitch(chromeos::switches::kLoginProfile)) {
     PathService::Get(chrome::DIR_USER_DATA, &log_dir);
     base::FilePath profile_dir;
-    if (command_line.HasSwitch(switches::kMultiProfiles)) {
+    std::string login_profile_value =
+        command_line.GetSwitchValueASCII(chromeos::switches::kLoginProfile);
+    if (login_profile_value == chrome::kLegacyProfileDir) {
+      profile_dir = base::FilePath(login_profile_value);
+    } else {
       // We could not use g_browser_process > profile_helper() here.
       std::string profile_dir_str = chrome::kProfileDirPrefix;
-      profile_dir_str.append(
-          command_line.GetSwitchValueASCII(chromeos::switches::kLoginProfile));
+      profile_dir_str.append(login_profile_value);
       profile_dir = base::FilePath(profile_dir_str);
-    } else {
-      profile_dir =
-          command_line.GetSwitchValuePath(chromeos::switches::kLoginProfile);
     }
     log_dir = log_dir.Append(profile_dir);
   }
   return log_dir.Append(GetLogFileName().BaseName());
 }
 
 void RedirectChromeLogging(const CommandLine& command_line) {
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kMultiProfiles) &&
       chrome_logging_redirected_) {
     // TODO(nkostylev): Support multiple active users. http://crbug.com/230345
@@ skipping 226 matching lines @@
                                           time_deets.year,
                                           time_deets.month,
                                           time_deets.day_of_month,
                                           time_deets.hour,
                                           time_deets.minute,
                                           time_deets.second);
   return base_path.InsertBeforeExtensionASCII(suffix);
 }
 
 }  // namespace logging