chromeos: convert more ash/wm code to aura::Window

ash/frame/caption_buttons/frame_size_button.cc

 // Copyright 2014 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 "ash/frame/caption_buttons/frame_size_button.h"
 
 #include "ash/shell_port.h"
 #include "ash/wm/window_positioning_utils.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/wm_event.h"
@@ skipping 195 matching lines @@
       case CAPTION_BUTTON_ICON_LOCATION:
       case CAPTION_BUTTON_ICON_COUNT:
         NOTREACHED();
         break;
     }
   }
 
   if (snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT) {
     aura::Window* window = frame_->GetNativeWindow();
     if (!phantom_window_controller_.get()) {
-      phantom_window_controller_.reset(new PhantomWindowController(window));
+      phantom_window_controller_ =
+          base::MakeUnique<PhantomWindowController>(window);
     }
     gfx::Rect phantom_bounds_in_screen =
         (snap_type_ == SNAP_LEFT)
             ? wm::GetDefaultLeftSnappedWindowBoundsInParent(window)
             : wm::GetDefaultRightSnappedWindowBoundsInParent(window);
     ::wm::ConvertRectToScreen(window->parent(), &phantom_bounds_in_screen);
     phantom_window_controller_->Show(phantom_bounds_in_screen);
   } else {
     phantom_window_controller_.reset();
   }
@@ skipping 36 matching lines @@
 void FrameSizeButton::SetButtonsToNormalMode(
     FrameSizeButtonDelegate::Animate animate) {
   in_snap_mode_ = false;
   snap_type_ = SNAP_NONE;
   set_buttons_to_snap_mode_timer_.Stop();
   delegate_->SetButtonsToNormal(animate);
   phantom_window_controller_.reset();
 }
 
 }  // namespace ash