[Refactor] Cache the views::Widget* that the FrameMaximizeButton acts on

ash/wm/panels/panel_frame_view.cc

 // Copyright (c) 2012 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/panels/panel_frame_view.h"
 
 #include "ash/wm/caption_buttons/frame_caption_button_container_view.h"
 #include "ash/wm/frame_painter.h"
 #include "grit/ash_resources.h"
 #include "third_party/skia/include/core/SkPaint.h"
@@ skipping 27 matching lines @@
 PanelFrameView::~PanelFrameView() {
 }
 
 const char* PanelFrameView::GetClassName() const {
   return kViewClassName;
 }
 
 void PanelFrameView::InitFramePainter() {
   frame_painter_.reset(new FramePainter);
 
-  caption_button_container_ = new FrameCaptionButtonContainerView(this, frame_,
+  caption_button_container_ = new FrameCaptionButtonContainerView(frame_,
       FrameCaptionButtonContainerView::MINIMIZE_ALLOWED);
   AddChildView(caption_button_container_);
 
   if (frame_->widget_delegate()->ShouldShowWindowIcon()) {
     window_icon_ = new views::ImageView();
     AddChildView(window_icon_);
   }
 
   frame_painter_->Init(frame_, window_icon_, caption_button_container_);
 }
@@ skipping 71 matching lines @@
 
 gfx::Rect PanelFrameView::GetWindowBoundsForClientBounds(
     const gfx::Rect& client_bounds) const {
   if (!frame_painter_)
     return client_bounds;
   return frame_painter_->GetWindowBoundsForClientBounds(
       caption_button_container_->bounds().bottom(), client_bounds);
 }
 
 }  // namespace ash