Reland of Wake Lock API implementation (Chromium part)

content/renderer/wake_lock/wake_lock_dispatcher.cc

Index: content/renderer/wake_lock/wake_lock_dispatcher.cc
diff --git a/content/renderer/wake_lock/wake_lock_dispatcher.cc b/content/renderer/wake_lock/wake_lock_dispatcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..47c4a681a2e56f0cf14acfa1c0ca2496ea7e2d19
--- /dev/null
+++ b/content/renderer/wake_lock/wake_lock_dispatcher.cc
@@ -0,0 +1,30 @@
+// Copyright 2015 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/renderer/wake_lock/wake_lock_dispatcher.h"
+
+#include "content/public/common/service_registry.h"
+#include "content/public/renderer/render_frame.h"
+
+namespace content {
+
+WakeLockDispatcher::WakeLockDispatcher(RenderFrame* render_frame)
+    : RenderFrameObserver(render_frame), blink::WebWakeLockClient() {}
+
+WakeLockDispatcher::~WakeLockDispatcher() {}
+
+void WakeLockDispatcher::requestKeepScreenAwake(bool keepScreenAwake) {
+  if (!wake_lock_service_) {
+    render_frame()->GetServiceRegistry()->ConnectToRemoteService(
+        mojo::GetProxy(&wake_lock_service_));
+  }
+
+  if (keepScreenAwake) {
+    wake_lock_service_->RequestWakeLock();
+  } else {
+    wake_lock_service_->CancelWakeLock();
+  }
+}
+
+}  // namespace content