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

chrome/browser/ui/panels/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_PANEL_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 234 matching lines @@
   // Handles keyboard events coming back from the renderer.
   void HandleKeyboardEvent(const content::NativeWebKeyboardEvent& event);
 
   // Whether the panel window is always on top.
   void SetAlwaysOnTop(bool on_top);
 
   // Sets whether the panel is shown in preview mode. When the panel is
   // being dragged, it is in preview mode.
   void SetPreviewMode(bool in_preview_mode);
 
-  // Sets up the panel for being resizable by the user - for example,
-  // enables the resize mouse cursors when mouse is hovering over the edges.
-  void EnableResizeByMouse(bool enable);
-
   // Sets whether the minimize or restore button, if any, are visible.
   void UpdateMinimizeRestoreButtonVisibility();
 
   // Changes the preferred size to acceptable based on min_size() and max_size()
   gfx::Size ClampSize(const gfx::Size& size) const;
 
   // Called when the panel's active state changes.
   // |active| is true if panel became active.
   void OnActiveStateChanged(bool active);
 
@@ skipping 131 matching lines @@
 
   // Icon showed in the task bar.
   gfx::Image app_icon_;
 
   base::WeakPtrFactory<Panel> image_loader_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Panel);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_H_