Report user actions when gesture starts and stops in user_model.

components/scheduler/renderer/renderer_scheduler_impl.cc

Index: components/scheduler/renderer/renderer_scheduler_impl.cc
diff --git a/components/scheduler/renderer/renderer_scheduler_impl.cc b/components/scheduler/renderer/renderer_scheduler_impl.cc
index 9076b2c56a6a7fde816d4f9cfe68f28321b04102..2a83799e484fd4b62878e9b24e03238ba07663f5 100644
--- a/components/scheduler/renderer/renderer_scheduler_impl.cc
+++ b/components/scheduler/renderer/renderer_scheduler_impl.cc
@@ -45,15 +45,15 @@ RendererSchedulerImpl::RendererSchedulerImpl(
                    base::TimeDelta()),
       render_widget_scheduler_signals_(this),
       control_task_runner_(helper_.ControlTaskRunner()),
-      compositor_task_runner_(
-          helper_.NewTaskQueue(TaskQueue::Spec("compositor_tq")
-                                   .SetShouldMonitorQuiescence(true))),
+      compositor_task_runner_(helper_.NewTaskQueue(
+          TaskQueue::Spec("compositor_tq").SetShouldMonitorQuiescence(true))),
       delayed_update_policy_runner_(
           base::Bind(&RendererSchedulerImpl::UpdatePolicy,
                      base::Unretained(this)),
           helper_.ControlTaskRunner()),
       main_thread_only_(compositor_task_runner_,
                         helper_.scheduler_tqm_delegate().get()),
+      any_thread_(helper_.DefaultTaskRunner()),
       policy_may_need_update_(&any_thread_lock_),
       weak_factory_(this) {
   throttling_helper_.reset(new ThrottlingHelper(this, "renderer.scheduler"));
@@ -129,8 +129,10 @@ RendererSchedulerImpl::MainThreadOnly::MainThreadOnly(
 
 RendererSchedulerImpl::MainThreadOnly::~MainThreadOnly() {}
 
-RendererSchedulerImpl::AnyThread::AnyThread()
-    : awaiting_touch_start_response(false),
+RendererSchedulerImpl::AnyThread::AnyThread(
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+    : user_model(task_runner),
+      awaiting_touch_start_response(false),
       in_idle_period(false),
       begin_main_frame_on_critical_path(false),
       last_gesture_was_compositor_driven(false),