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

chrome/browser/ui/cocoa/panels/panel_cocoa.mm

 // 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 "chrome/browser/ui/cocoa/panels/panel_cocoa.h"
 
 #include "base/logging.h"
 #import "chrome/browser/ui/cocoa/chrome_event_processing_window.h"
 #import "chrome/browser/ui/cocoa/panels/panel_titlebar_view_cocoa.h"
 #import "chrome/browser/ui/cocoa/panels/panel_utils_cocoa.h"
@@ skipping 243 matching lines @@
 }
 
 void PanelCocoa::SetPanelAlwaysOnTop(bool on_top) {
   if (always_on_top_ == on_top)
     return;
   always_on_top_ = on_top;
   [controller_ updateWindowLevel];
   [controller_ updateWindowCollectionBehavior];
 }
 
-void PanelCocoa::EnableResizeByMouse(bool enable) {
-  [controller_ enableResizeByMouse:enable];
-}
-
 void PanelCocoa::UpdatePanelMinimizeRestoreButtonVisibility() {
   [controller_ updateTitleBarMinimizeRestoreButtonVisibility];
 }
 
 void PanelCocoa::SetWindowCornerStyle(panel::CornerStyle corner_style) {
   corner_style_ = corner_style;
 
   // TODO(dimich): investigate how to support it on Mac.
 }
 
@@ skipping 182 matching lines @@
 panel::CornerStyle CocoaNativePanelTesting::GetWindowCornerStyle() const {
   return native_panel_window_->corner_style_;
 }
 
 bool CocoaNativePanelTesting::EnsureApplicationRunOnForeground() {
   if ([NSApp isActive])
     return true;
   [NSApp activateIgnoringOtherApps:YES];
   return [NSApp isActive];
 }