Enable WebVR origin trial experiments.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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/frame_host/render_frame_host_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 2166 matching lines @@
   // state of the page and also honoring user override of bad certificates.
   GetInterfaceRegistry()->AddInterface(
       base::Bind(&WebSocketManager::CreateWebSocket,
                  process_->GetID(),
                  routing_id_));
 
 #if defined(ENABLE_WEBVR)
   const base::CommandLine& browser_command_line =
       *base::CommandLine::ForCurrentProcess();
 
+  // What to do here?  This is behind a build flag any way so maybe wait until

[iclelland, 2016/10/05 21:55:57]

If WebVR ships as an origin trial, then I think that you'll need to enable the
browser-side components unconditionally, since you can't tell whether any given
renderer is going to need it until it actually navigates to the page.

[amp, 2016/10/05 22:04:43]

I think we are going for having the components always there, but I'm not exactly
sure what the VRService here does so I'll dig a bit more.

+  // that is fixed to modify this, but then should this be gated by runtime and
+  // origin trial features, not a command line switch directly?
+  // WebBluetooth (which is also in an origin trial) also uses a command line
+  // switch in this file.
   if (browser_command_line.HasSwitch(switches::kEnableWebVR)) {
+  /*
+  if (RuntimeEnabledFeatures::webVREnabled())
+    // || OriginTrials::webVREnabled())
+  */
     GetInterfaceRegistry()->AddInterface<device::VRService>(
         base::Bind(&device::VRServiceImpl::BindRequest));
   }
 #endif
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableGenericSensors)) {
     GetInterfaceRegistry()->AddInterface(
         base::Bind(&device::SensorProviderImpl::Create),
         BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
   }
@@ skipping 890 matching lines @@
   web_bluetooth_service_->SetClientConnectionErrorHandler(base::Bind(
       &RenderFrameHostImpl::DeleteWebBluetoothService, base::Unretained(this)));
   return web_bluetooth_service_.get();
 }
 
 void RenderFrameHostImpl::DeleteWebBluetoothService() {
   web_bluetooth_service_.reset();
 }
 
 }  // namespace content