Convert device_sensors to use mojo.

content/common/device_sensors/device_light_messages.h

Index: content/common/device_sensors/device_light_messages.h
diff --git a/content/common/device_sensors/device_light_messages.h b/content/common/device_sensors/device_light_messages.h
deleted file mode 100644
index 4fad255468b20817de80fd20fdb1c54542a619d8..0000000000000000000000000000000000000000
--- a/content/common/device_sensors/device_light_messages.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// IPC messages for device light.
-// Multiply-included message file, hence no include guard.
-
-#include "base/memory/shared_memory.h"
-#include "ipc/ipc_message_macros.h"
-#include "ipc/ipc_param_traits.h"
-#include "ipc/ipc_platform_file.h"
-
-#define IPC_MESSAGE_START DeviceLightMsgStart
-
-// Asks the browser process to activate Device Light sensors if necessary.
-IPC_MESSAGE_CONTROL0(DeviceLightHostMsg_StartPolling)
-
-// The browser process asynchronously returns the shared memory handle that
-// will hold the data from the hardware sensors.
-IPC_MESSAGE_CONTROL1(DeviceLightMsg_DidStartPolling,
-                     base::SharedMemoryHandle /* handle */)
-
-// Notifies the browser process that the renderer process is not using the
-// Device Light data anymore. The number of Starts should match the number
-// of Stops.
-IPC_MESSAGE_CONTROL0(DeviceLightHostMsg_StopPolling)