Move Cocoa Page Info UI code to its own folder.

chrome/browser/ui/cocoa/website_settings/website_settings_utils_cocoa.mm

-// Copyright 2014 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/website_settings/website_settings_utils_cocoa.h"
-
-namespace {
-// The amount of horizontal space between the button's title and its arrow icon.
-const CGFloat kButtonTitleRightPadding = 4.0f;
-}
-
-// Determine the size of a popup button with the given title.
-NSSize SizeForWebsiteSettingsButtonTitle(NSPopUpButton* button,
-                                         NSString* title) {
-  NSDictionary* textAttributes =
-      [[button attributedTitle] attributesAtIndex:0 effectiveRange:NULL];
-  NSSize titleSize = [title sizeWithAttributes:textAttributes];
-
-  NSRect frame = [button frame];
-  NSRect titleRect = [[button cell] titleRectForBounds:frame];
-  CGFloat width = titleSize.width + NSWidth(frame) - NSWidth(titleRect);
-
-  return NSMakeSize(width + kButtonTitleRightPadding, NSHeight(frame));
-}