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 ce702ed8d04264ac0ed225955539d8829e9dc1bd..9920b923ea6ba4d068eb1f1cb2f11d8e5b7a9220 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 kDisableAsyncDns[];
 extern const char kDisableAuthNegotiateCnameLookup[];
 extern const char kDisableBackgroundNetworking[];
@@ -399,6 +400,7 @@ 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