This change modifies behavior of crash dialog in case of aura metro.

chrome/common/env_vars.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/common/env_vars.h"
 
 namespace env_vars {
 
 // We call running in unattended mode (for automated testing) "headless".
 // This mode can be enabled using this variable or by the kNoErrorDialogs
 // switch.
 const char kHeadless[] = "CHROME_HEADLESS";
 
 // The name of the log file.
 const char kLogFileName[] = "CHROME_LOG_FILE";
 
+// Flag indicating if metro viewer is connected to browser instance.
+// As of now there is only one metro viewer instance per browser.
+const char kMetroConnected[] = "CHROME_METRO_CONNECTED";
+
 // The name of the session log directory when logged in to ChromeOS.
 const char kSessionLogDir[] = "CHROMEOS_SESSION_LOG_DIR";
 
 // CHROME_CRASHED exists if a previous instance of chrome has crashed. This
 // triggers the 'restart chrome' dialog. CHROME_RESTART contains the strings
 // that are needed to show the dialog.
 const char kShowRestart[] = "CHROME_CRASHED";
 const char kRestartInfo[] = "CHROME_RESTART";
 
 // The strings RIGHT_TO_LEFT and LEFT_TO_RIGHT indicate the locale direction.
 // For example, for Hebrew and Arabic locales, we use RIGHT_TO_LEFT so that the
 // dialog is displayed using the right orientation.
 const char kRtlLocale[] = "RIGHT_TO_LEFT";
 const char kLtrLocale[] = "LEFT_TO_RIGHT";
 
 // Number of times to run a given startup_tests unit test.
 const char kStartupTestsNumCycles[] = "STARTUP_TESTS_NUMCYCLES";
 
 // The presence of this environment variable with a value of 1 implies that
 // setup.exe should run as a system installation regardless of what is on the
 // command line.
 // TODO(erikwright): Put this in chrome/installer/util/util_constants.cc when
 // http://crbug.com/174953 is fixed and widely deployed.
 const char kGoogleUpdateIsMachineEnvVar[] = "GoogleUpdateIsMachine";
 
 }  // namespace env_vars