mus ws: Move 'reset(new' to base::MakeUnique.

services/ui/ws/frame_generator.cc

Index: services/ui/ws/frame_generator.cc
diff --git a/services/ui/ws/frame_generator.cc b/services/ui/ws/frame_generator.cc
index d1d6b6b29562455ddb6bcf24d216b136bbfb5c76..baa9b0f694aba28a84092ce3849ccc2df0c8aa71 100644
--- a/services/ui/ws/frame_generator.cc
+++ b/services/ui/ws/frame_generator.cc
@@ -40,9 +40,9 @@ FrameGenerator::~FrameGenerator() {
 void FrameGenerator::OnGpuChannelEstablished(
     scoped_refptr<gpu::GpuChannelHost> channel) {
   if (widget_ != gfx::kNullAcceleratedWidget) {
-    display_compositor_.reset(
-        new DisplayCompositor(base::ThreadTaskRunnerHandle::Get(), widget_,
-                              std::move(channel), surfaces_state_));
+    display_compositor_ = base::MakeUnique<DisplayCompositor>(
+        base::ThreadTaskRunnerHandle::Get(), widget_, std::move(channel),
+        surfaces_state_);
   } else {
     gpu_channel_ = std::move(channel);
   }