Replace scoped_ptr with std::unique_ptr in //ui

ui/aura/window_tree_host.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/window_tree_host.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/cursor_client.h"
@@ skipping 232 matching lines @@
   DCHECK(Env::GetInstance());
   ui::ContextFactory* context_factory = Env::GetInstance()->context_factory();
   DCHECK(context_factory);
   compositor_.reset(
       new ui::Compositor(context_factory, base::ThreadTaskRunnerHandle::Get()));
   if (!dispatcher()) {
     window()->Init(ui::LAYER_NOT_DRAWN);
     window()->set_host(this);
     window()->SetName("RootWindow");
     window()->SetEventTargeter(
-        scoped_ptr<ui::EventTargeter>(new WindowTargeter()));
+        std::unique_ptr<ui::EventTargeter>(new WindowTargeter()));
     dispatcher_.reset(new WindowEventDispatcher(this));
   }
 }
 
 void WindowTreeHost::OnAcceleratedWidgetAvailable() {
   compositor_->SetAcceleratedWidget(GetAcceleratedWidget());
   prop_.reset(new ui::ViewProp(GetAcceleratedWidget(),
                                kWindowTreeHostForAcceleratedWidget, this));
 }
 
@@ skipping 50 matching lines @@
   client::CursorClient* cursor_client = client::GetCursorClient(window());
   if (cursor_client) {
     const gfx::Display& display =
         gfx::Screen::GetScreen()->GetDisplayNearestWindow(window());
     cursor_client->SetDisplay(display);
   }
   dispatcher()->OnCursorMovedToRootLocation(root_location);
 }
 
 }  // namespace aura