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

chrome/common/env_vars.cc

Index: chrome/common/env_vars.cc
diff --git a/chrome/common/env_vars.cc b/chrome/common/env_vars.cc
index 063d15b4cbd189b8ea94bafd80a4625141b4804b..5499dc3ca8dd90ecc5f0c7b0b20d23cec45435d1 100644
--- a/chrome/common/env_vars.cc
+++ b/chrome/common/env_vars.cc
@@ -14,6 +14,10 @@ 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";