Refactor PhantomWindowController so that the PhantomWindowController owns the phantom window

ash/wm/caption_buttons/alternate_frame_size_button.cc

 // Copyright 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 "ash/wm/caption_buttons/alternate_frame_size_button.h"
 
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/shell.h"
 #include "ash/touch/touch_uma.h"
 #include "ash/wm/window_state.h"
+#include "ash/wm/workspace/phantom_window_controller.h"
 #include "ash/wm/workspace/snap_sizer.h"
 #include "ui/gfx/vector2d.h"
 #include "ui/views/widget/widget.h"
 
 namespace {
 
 // The default delay between the user pressing the size button and the buttons
 // adjacent to the size button morphing into buttons for snapping left and
 // right.
 const int kSetButtonsToSnapModeDelayMs = 150;
@@ skipping 148 matching lines @@
         break;
       case CAPTION_BUTTON_ICON_MAXIMIZE_RESTORE:
         // snap_type_ = SNAP_NONE
         break;
       case CAPTION_BUTTON_ICON_MINIMIZE:
       case CAPTION_BUTTON_ICON_CLOSE:
         NOTREACHED();
         break;
     }
   }
+
+  if (snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT) {
+    if (!phantom_window_controller_.get()) {
+      phantom_window_controller_.reset(
+          new internal::PhantomWindowController(frame_->GetNativeWindow()));
+    }
+
+    using internal::SnapSizer;
+    SnapSizer snap_sizer(wm::GetWindowState(frame_->GetNativeWindow()),
+                         gfx::Point(),
+                         snap_type_ == SNAP_LEFT ?
+                             SnapSizer::LEFT_EDGE : SnapSizer::RIGHT_EDGE,
+                         SnapSizer::OTHER_INPUT);
+    phantom_window_controller_->Show(snap_sizer.target_bounds());
+  } else {
+    if (phantom_window_controller_.get())
+      phantom_window_controller_->StartFadeOut();
+  }
 }
 
 bool AlternateFrameSizeButton::CommitSnap(const ui::LocatedEvent& event) {
   // The position of |event| may be different than the position of the previous
   // event.
   UpdatePressedButton(event);
 
   if (in_snap_mode_ &&
       (snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT)) {
     using internal::SnapSizer;
@@ skipping 10 matching lines @@
   SetButtonsToNormalMode(AlternateFrameSizeButtonDelegate::ANIMATE_YES);
   return false;
 }
 
 void AlternateFrameSizeButton::SetButtonsToNormalMode(
     AlternateFrameSizeButtonDelegate::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