Adding Chrome-side WebVR interface

content/browser/renderer_host/vr_message_filter.cc

+// 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/browser/renderer_host/vr_message_filter.h"
+
+#include "content/common/vr_messages.h"
+#include "third_party/WebKit/public/platform/WebVR.h"
+
+namespace content {
+
+VRMessageFilter::VRMessageFilter()
+    : BrowserMessageFilter(VRMsgStart) {
+}
+
+VRMessageFilter::~VRMessageFilter() {
+}
+
+void VRMessageFilter::OnDestruct() const {
+  BrowserThread::DeleteOnIOThread::Destruct(this);
+}
+
+bool VRMessageFilter::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(VRMessageFilter, message)
+    IPC_MESSAGE_HANDLER(VRHostMsg_GetVRDevices,
+        OnGetVRDevices)
+    IPC_MESSAGE_HANDLER(VRHostMsg_GetSensorState,
+        OnGetSensorState)
+    IPC_MESSAGE_HANDLER(VRHostMsg_ResetSensor,
+        OnResetSensor)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void VRMessageFilter::OnGetVRDevices(
+    int32_t render_frame_id,
+    int request_id) {
+  std::vector<blink::WebVRDevice> devices;
+  GetServiceInstance()->GetVRDevices(&devices);
+  Send(new VRMsg_GetDevicesSuccess(render_frame_id, request_id, devices));
+}
+
+void VRMessageFilter::OnGetSensorState(
+    int32_t render_frame_id,
+    unsigned int index,
+    blink::WebHMDSensorState* state) {
+  VRDevice* device = GetServiceInstance()->GetDevice(index);
+  if (device) {

[Ted C, 2015/04/24 01:06:06]

typically you don't need braces unless it's confusing without them for these one
liners...this applies throughout the change.

also fun fact.  in java braces are always required unless the statement and
condition can all fit on the same line.  in c++, the condition and statement go
on separate lines.  Unless it's a thursday of an odd month.

+    device->GetSensorState(state);
+  }
+}
+
+void VRMessageFilter::OnResetSensor(
+    int32_t render_frame_id,
+    unsigned int index) {
+  VRDevice* device = GetServiceInstance()->GetDevice(index);
+  if (device) {
+    device->ResetSensor();
+  }
+}
+
+}  // namespace content