[Chromecast] Add new crash keys from chrome/common.

chrome/common/crash_keys.cc

Index: chrome/common/crash_keys.cc
diff --git a/chrome/common/crash_keys.cc b/chrome/common/crash_keys.cc
index a53beeaafb2867a53d740f3ee8e2acf9ad1946e0..664a6acefe4c08d1db5b765f2744e9444445a7ac 100644
--- a/chrome/common/crash_keys.cc
+++ b/chrome/common/crash_keys.cc
@@ -103,7 +103,8 @@ size_t RegisterChromeCrashKeys() {
   // If you're adding keys here, please also add them to the following lists:
   // chrome/app/chrome_crash_reporter_client_win.cc::RegisterCrashKeysHelper(),
   // android_webview/common/crash_reporter/crash_keys.cc::
-  //     RegisterWebViewCrashKeys().
+  //     RegisterWebViewCrashKeys(),
+  // chromecast/crash/cast_crash_keys.cc::RegisterCastCrashKeys().
   base::debug::CrashKey fixed_keys[] = {
 #if defined(OS_MACOSX) || defined(OS_WIN)
     {kMetricsClientId, kSmallSize},