Fix non-otr profile's file manager being launched in guest mode.

chrome/browser/ui/browser.cc

 // Copyright 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/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // defined(OS_WIN)
@@ skipping 337 matching lines @@
       command_controller_(new chrome::BrowserCommandController(
           this, g_browser_process->profile_manager())),
       window_has_shown_(false),
       chrome_updater_factory_(this),
       weak_factory_(this),
       language_state_observer_(new BrowserLanguageStateObserver(this)) {
   // If this causes a crash then a window is being opened using a profile type
   // that is disallowed by policy. The crash prevents the disabled window type
   // from opening at all, but the path that triggered it should be fixed.
   CHECK(IncognitoModePrefs::CanOpenBrowser(profile_));
+  CHECK(!profile_->IsGuestSession() || profile_->IsOffTheRecord())
+      << "Only off the record browser may be opened in guest mode";
 
   // TODO(jeremy): Move to initializer list once flag is removed.
   if (IsFastTabUnloadEnabled())
     fast_unload_controller_.reset(new chrome::FastUnloadController(this));
   else
     unload_controller_.reset(new chrome::UnloadController(this));
 
   if (!app_name_.empty())
     chrome::RegisterAppPrefs(app_name_, profile_);
   tab_strip_model_->AddObserver(this);
@@ skipping 1921 matching lines @@
   if (contents && !allow_js_access) {
     contents->web_contents()->GetController().LoadURL(
         target_url,
         content::Referrer(),
         content::PAGE_TRANSITION_LINK,
         std::string());  // No extra headers.
   }
 
   return contents != NULL;
 }