[DeviceLight API] Content Side

content/browser/device_light/device_light_message_filter.cc

Index: content/browser/device_light/device_light_message_filter.cc
diff --git a/content/browser/device_light/device_light_message_filter.cc b/content/browser/device_light/device_light_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1d3a289dfde72a5a546eb25ccb9626b97c3db9e2
--- /dev/null
+++ b/content/browser/device_light/device_light_message_filter.cc
@@ -0,0 +1,66 @@
+// 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.
+
+#include "content/browser/device_light/device_light_message_filter.h"
+
+#include "content/browser/device_orientation/device_inertial_sensor_service.h"
+#include "content/common/device_light/device_light_messages.h"
+
+namespace content {
+
+DeviceLightMessageFilter::DeviceLightMessageFilter()
+    : BrowserMessageFilter(DeviceLightMsgStart),
+      is_started_(false) {
+}
+
+DeviceLightMessageFilter::~DeviceLightMessageFilter() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (is_started_)
+    DeviceInertialSensorService::GetInstance()->RemoveConsumer(
+        CONSUMER_TYPE_LIGHT);
+}
+
+bool DeviceLightMessageFilter::OnMessageReceived(
+    const IPC::Message& message,
+    bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(DeviceLightMessageFilter,
+                           message,
+                           *message_was_ok)
+    IPC_MESSAGE_HANDLER(DeviceLightHostMsg_StartPolling,
+                        OnDeviceLightStartPolling)
+    IPC_MESSAGE_HANDLER(DeviceLightHostMsg_StopPolling,
+                        OnDeviceLightStopPolling)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+void DeviceLightMessageFilter::OnDeviceLightStartPolling() {
+  DCHECK(!is_started_);
+  if (is_started_)
+    return;
+  is_started_ = true;
+  DeviceInertialSensorService::GetInstance()->AddConsumer(
+      CONSUMER_TYPE_LIGHT);
+  DidStartDeviceLightPolling();
+}
+
+void DeviceLightMessageFilter::OnDeviceLightStopPolling() {
+  DCHECK(is_started_);
+  if (!is_started_)
+    return;
+  is_started_ = false;
+  DeviceInertialSensorService::GetInstance()->RemoveConsumer(
+      CONSUMER_TYPE_LIGHT);
+}
+
+void DeviceLightMessageFilter::DidStartDeviceLightPolling() {
+  Send(new DeviceLightMsg_DidStartPolling(
+      DeviceInertialSensorService::GetInstance()->
+          GetSharedMemoryHandleForProcess(
+              CONSUMER_TYPE_LIGHT, PeerHandle())));
+}
+
+}  // namespace content