Adding Chrome-side WebVR interface

content/renderer/vr/vr_dispatcher.h

Index: content/renderer/vr/vr_dispatcher.h
diff --git a/content/renderer/vr/vr_dispatcher.h b/content/renderer/vr/vr_dispatcher.h
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+// 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.
+
+#ifndef CONTENT_RENDERER_VR_DISPATCHER_H_
+#define CONTENT_RENDERER_VR_DISPATCHER_H_
+
+#include <vector>
+
+#include "base/id_map.h"
+#include "content/public/renderer/render_frame_observer.h"
+#include "third_party/WebKit/public/platform/WebVR.h"
+#include "third_party/WebKit/public/platform/WebVRClient.h"
+#include "third_party/WebKit/public/platform/WebVector.h"
+
+namespace content {
+
+class VRDispatcher : public RenderFrameObserver,
+                     NON_EXPORTED_BASE(public blink::WebVRClient) {
+ public:
+  explicit VRDispatcher(RenderFrame* render_frame);
+  ~VRDispatcher();
+
+  // RenderFrameObserver implementation.
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+  // blink::WebVRClient implementation.
+  void getDevices(blink::WebVRGetDevicesCallback* callback) override;
+
+  void getSensorState(unsigned int index,
+                      blink::WebHMDSensorState& state) override;
+
+  void resetSensor(unsigned int index) override;
+
+ private:
+  // IPC Handlers
+  void OnGetDevicesSuccess(int request_id,
+                           const std::vector<blink::WebVRDevice>& devices);
+  void OnGetDevicesError(int request_id);
+
+  // Tracks requests sent to browser to match replies with callbacks.
+  // Owns callback objects.
+  IDMap<blink::WebVRGetDevicesCallback, IDMapOwnPointer> pending_requests_;
+
+  DISALLOW_COPY_AND_ASSIGN(VRDispatcher);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_VR_DISPATCHER_H_