Send input event IPCs directly from the UI thread

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 8abf5cda03df426a8d82d7f74982f38d35b81302..16d9f700498e053775fe4bc5cee768a029b260ad 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -230,7 +230,8 @@ RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 
   input_router_.reset(new InputRouterImpl(
-      process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
+      process_->GetImmediateSender(), this, this, routing_id_,
+      GetInputRouterConfigForPlatform()));
 
   touch_emulator_.reset();
 
@@ -1346,7 +1347,8 @@ void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
   // event. (In particular, the above call to view_->RenderProcessGone will
   // destroy the aura window, which may dispatch a synthetic mouse move.)
   input_router_.reset(new InputRouterImpl(
-      process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
+      process_->GetImmediateSender(), this, this, routing_id_,
+      GetInputRouterConfigForPlatform()));
 
   synthetic_gesture_controller_.reset();
 }