[sensors] Introduce Generic Sensor API interfaces

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index ec402d5f1e27adf7dae049e9632c55869854705a..308e235316bca2110386f1849966c2f4b2bb8f48 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -80,6 +80,7 @@
 #include "content/public/common/isolated_world_ids.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/url_utils.h"
+#include "device/generic_sensor/sensor_service.h"
 #include "device/geolocation/geolocation_service_context.h"
 #include "device/vibration/vibration_manager_impl.h"
 #include "media/mojo/interfaces/media_service.mojom.h"
@@ -2141,6 +2142,12 @@ void RenderFrameHostImpl::RegisterMojoInterfaces() {
         base::Bind(&device::VRServiceImpl::BindRequest));
   }
 #endif
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableGenericSensors)) {
+    GetInterfaceRegistry()->AddInterface(base::Bind(

[Ken Rockot(use gerrit already), 2016/08/18 19:36:00]

AddInterface() itself can take a task runner as a second argument:

  GetInterfaceRegistry()->AddInterface(
      base::Bind(&SensorProviderImpl::Create),
      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));

[Mikhail, 2016/08/19 09:29:55]

Done.

+        &device::SensorService::BindRequest,
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::IO)));
+  }
 
   GetContentClient()->browser()->RegisterRenderFrameMojoInterfaces(
       GetInterfaceRegistry(), this);