Introduce SigninManagerDelegate and use to eliminate CookieSettings dependency.

chrome/browser/signin/chrome_signin_manager_delegate.cc

+// Copyright 2013 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/signin/chrome_signin_manager_delegate.h"
+
+#include "chrome/browser/content_settings/cookie_settings.h"
+#include "googleurl/src/gurl.h"
+
+namespace {
+
+const char kGoogleAccountsUrl[] = "https://accounts.google.com";
+
+}  // namespace
+
+ChromeSigninManagerDelegate::ChromeSigninManagerDelegate(Profile* profile)
+    : profile_(profile) {
+}
+
+ChromeSigninManagerDelegate::~ChromeSigninManagerDelegate() {
+}
+
+// static
+bool ChromeSigninManagerDelegate::ProfileAllowsSigninCookies(Profile* profile) {
+  CookieSettings* cookie_settings =
+      CookieSettings::Factory::GetForProfile(profile);
+  return SettingsAllowSigninCookies(cookie_settings);
+}
+
+// static
+bool ChromeSigninManagerDelegate::SettingsAllowSigninCookies(
+    CookieSettings* cookie_settings) {
+  return cookie_settings &&
+      cookie_settings->IsSettingCookieAllowed(GURL(kGoogleAccountsUrl),
+                                              GURL(kGoogleAccountsUrl));
+}
+
+
+bool ChromeSigninManagerDelegate::AreSigninCookiesAllowed() {
+  return ProfileAllowsSigninCookies(profile_);
+}