Integrate About page into Settings for Chrome OS settings in a window.

chrome/common/chrome_switches.h

Index: chrome/common/chrome_switches.h
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index 51af076ffd6e94dd43fa998082ae728bdd8252e5..84bca6345c8416d6f80395747a6b20ffd016d85d 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -65,6 +65,7 @@ extern const char kDebugPackedApps[];
 extern const char kDiagnostics[];
 extern const char kDiagnosticsFormat[];
 extern const char kDiagnosticsRecovery[];
+extern const char kDisableAboutInSettings[];
 extern const char kDisableAnswersInSuggest[];
 extern const char kDisableAsyncDns[];
 extern const char kDisableAuthNegotiateCnameLookup[];
@@ -407,6 +408,7 @@ extern const char kAllowNaClSocketAPI[];
 extern const char kFileManagerExtensionPath[];
 #endif
 
+bool AboutInSettingsEnabled();
 bool SettingsWindowEnabled();
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in