Switch to doing user-resizing via system for panels on Mac

chrome/browser/ui/panels/native_panel.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_
 #define CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_
 
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_constants.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 54 matching lines @@
       const gfx::Size& content_size) const = 0;
   virtual gfx::Size ContentSizeFromWindowSize(
       const gfx::Size& window_size) const = 0;
 
   virtual int TitleOnlyHeight() const = 0;
 
   // Gets or sets whether the panel window is always on top.
   virtual bool IsPanelAlwaysOnTop() const = 0;
   virtual void SetPanelAlwaysOnTop(bool on_top) = 0;
 
-  // Enables resizing by dragging edges/corners.
-  virtual void EnableResizeByMouse(bool enable) = 0;
-
   // Updates the visibility of the minimize and restore buttons.
   virtual void UpdatePanelMinimizeRestoreButtonVisibility() = 0;
 
   // Sets how the panel window displays its 4 corners, rounded or not.
   virtual void SetWindowCornerStyle(panel::CornerStyle corner_style) = 0;
 
   // Performs the system minimize for the panel, i.e. becoming iconic.
   virtual void MinimizePanelBySystem() = 0;
 
   // Returns true if the panel has been minimized by the system, i.e. becoming
@@ skipping 52 matching lines @@
   virtual bool IsButtonVisible(panel::TitlebarButtonType button_type) const = 0;
 
   virtual panel::CornerStyle GetWindowCornerStyle() const = 0;
 
   // Makes sure that the application is running on foreground. Returns false
   // if the effort fails.
   virtual bool EnsureApplicationRunOnForeground() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_