Revert "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 dd81f2741e3b09173e17e8d8e32a61f2b3ff50a7..a5ab74c85d2d3e524521fb604d00eefa4b4bec0c 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -233,8 +233,7 @@ RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 
   input_router_.reset(new InputRouterImpl(
-      process_->GetImmediateSender(), this, this, routing_id_,
-      GetInputRouterConfigForPlatform()));
+      process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 
   touch_emulator_.reset();
 
@@ -1381,8 +1380,7 @@ 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_->GetImmediateSender(), this, this, routing_id_,
-      GetInputRouterConfigForPlatform()));
+      process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 
   synthetic_gesture_controller_.reset();
 }