[DeviceService] Mojofy left screen orientation IPC messages.

content/common/screen_orientation_messages.h

Index: content/common/screen_orientation_messages.h
diff --git a/content/common/screen_orientation_messages.h b/content/common/screen_orientation_messages.h
index 1a0e3e8ee12030d05c5dd02e9e59daf7b84e5591..fd456622f12c27f7b0edfb619bdfcbdf0ea2a352 100644
--- a/content/common/screen_orientation_messages.h
+++ b/content/common/screen_orientation_messages.h
@@ -19,17 +19,3 @@
 IPC_ENUM_TRAITS_MIN_MAX_VALUE(blink::WebScreenOrientationLockType,
                               blink::WebScreenOrientationLockDefault,
                               blink::WebScreenOrientationLockNatural)
-
-// The renderer process is now using the Screen Orientation API and informs the
-// browser process that it should start accurately listening to the screen
-// orientation if it wasn't already.
-// This is only expected to be acted upon when the underlying platform requires
-// heavy work in order to accurately know the screen orientation.
-IPC_MESSAGE_CONTROL0(ScreenOrientationHostMsg_StartListening)
-
-// The renderer process is no longer using the Screen Orientation API and
-// informs the browser process that it can stop accurately listening to the
-// screen orientation if no other process cares about it.
-// This is only expected to be acted upon when the underlying platform requires
-// heavy work in order to accurately know the screen orientation.
-IPC_MESSAGE_CONTROL0(ScreenOrientationHostMsg_StopListening)