Forward input tasks to the Blink scheduler

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index 3a2605b4c6800ffe6281ca95d956b8c96832ecb9..123fe70ad9bc64967bbaa9c9802868aea18d0b39 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -20,6 +20,7 @@
 #include "cc/layers/layer.h"
 #include "cc/output/context_provider.h"
 #include "cc/trees/layer_tree_host.h"
+#include "cc/trees/main_thread_task_runner.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/compositor/compositor_observer.h"
 #include "ui/compositor/compositor_switches.h"
@@ -142,10 +143,12 @@ Compositor::Compositor(gfx::AcceleratedWidget widget,
         this,
         context_factory_->GetSharedBitmapManager(),
         settings,
+        make_scoped_refptr(new cc::DefaultMainThreadTaskRunner()),
         compositor_thread_loop_);
   } else {
     host_ = cc::LayerTreeHost::CreateSingleThreaded(
-        this, this, context_factory_->GetSharedBitmapManager(), settings);
+        this, this, context_factory_->GetSharedBitmapManager(), settings,
+        make_scoped_refptr(new cc::DefaultMainThreadTaskRunner()));
   }
   UMA_HISTOGRAM_TIMES("GPU.CreateBrowserCompositor",
                       base::TimeTicks::Now() - before_create);