[Reland] Enable AutoResize for Constrained Web Dialogs for Mac.

chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.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.
 
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
 
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
 #import "ui/base/cocoa/constrained_window/constrained_window_animation.h"
 
 @implementation CustomConstrainedWindowSheet
@@ skipping 55 matching lines @@
 }
 
 - (void)updateSheetPosition {
   ConstrainedWindowSheetController* controller =
       [ConstrainedWindowSheetController controllerForSheet:self];
   NSPoint origin = [controller originForSheet:self
                                withWindowSize:[customWindow_ frame].size];
   [customWindow_ setFrameOrigin:origin];
 }
 
+- (void)resizeWithNewSize:(NSSize)size {
+  // NOOP
+}
+
 - (NSWindow*)sheetWindow {
   return customWindow_;
 }
 
 @end