Make the maximize button more easily hittable when there is a huge amount of tabs present

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/frame_painter.h"
 #include "grit/ash_resources.h"
 #include "grit/ui_strings.h"  // Accessibility names
 #include "third_party/skia/include/core/SkPaint.h"
@@ skipping 84 matching lines @@
 void PanelFrameView::UpdateWindowTitle() {
   if (!frame_painter_)
     return;
   frame_painter_->SchedulePaintForTitle(title_font_);
 }
 
 void PanelFrameView::GetWindowMask(const gfx::Size&, gfx::Path*) {
   // Nothing.
 }
 
-int PanelFrameView::NonClientHitTest(const gfx::Point& point) {
+int PanelFrameView::NonClientHitTest(const gfx::Point& point) const {
   if (!frame_painter_)
     return HTNOWHERE;
   return frame_painter_->NonClientHitTest(this, point);
 }
 
 void PanelFrameView::OnPaint(gfx::Canvas* canvas) {
   if (!frame_painter_)
     return;
   bool paint_as_active = ShouldPaintAsActive();
   int theme_frame_id = 0;
@@ skipping 32 matching lines @@
 
 void PanelFrameView::ButtonPressed(views::Button* sender,
                                    const ui::Event& event) {
   if (sender == close_button_)
     GetWidget()->Close();
   if (sender == minimize_button_)
     GetWidget()->Minimize();
 }
 
 }  // namespace ash