Don't activate a window if screen is locked.

chrome/browser/chromeos/login/base_login_display_host.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/chromeos/login/base_login_display_host.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 179 matching lines @@
 #if defined(USE_AURA)
   if (kEnableSigninTransitions)
     StartAnimation();
   else
     ShutdownDisplayHost(false);
 #else
   ShutdownDisplayHost(false);
 #endif
 }
 
+void BaseLoginDisplayHost::PreSessionStart() {
+#if defined(USE_AURA)
+  GetWidget()->GetNativeView()->set_stops_event_propagation(false);

[sky, 2012/01/12 01:05:14]

Add a comment as to why this is needed.

+#endif
+}
+
 void BaseLoginDisplayHost::StartWizard(
     const std::string& first_screen_name,
     DictionaryValue* screen_parameters) {
   DVLOG(1) << "Starting wizard, first_screen_name: " << first_screen_name;
   // Create and show the wizard.
   // Note, dtor of the old WizardController should be called before ctor of the
   // new one, because "default_controller()" is updated there. So pure "reset()"
   // is done before new controller creation.
   wizard_controller_.reset();
   wizard_controller_.reset(CreateWizardController());
@@ skipping 377 matching lines @@
   // user has changed to during OOBE.
   if (!timezone_name.empty()) {
     icu::TimeZone* timezone = icu::TimeZone::createTimeZone(
         icu::UnicodeString::fromUTF8(timezone_name));
     CHECK(timezone) << "Timezone could not be set for " << timezone_name;
     chromeos::system::TimezoneSettings::GetInstance()->SetTimezone(*timezone);
   }
 }
 
 }  // namespace browser