[Cronet] Fix compilation and test errors for CookieStoreIOS.

ios/net/cookies/cookie_store_ios.mm

 // Copyright 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 "ios/net/cookies/cookie_store_ios.h"
 
 #import <Foundation/Foundation.h>
 #include <stddef.h>
 
 #include "base/bind.h"
@@ skipping 573 matching lines @@
   base::scoped_nsobject<NSArray> copy(
       [[NSArray alloc] initWithArray:[system_store_ cookies]]);
   for (NSHTTPCookie* cookie in copy.get())
     [system_store_ deleteCookie:cookie];
   DCHECK_EQ(0u, [[system_store_ cookies] count]);
   creation_time_manager_->Clear();
 }
 
 bool CookieStoreIOS::SystemCookiesAllowed() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  return [system_store_ cookieAcceptPolicy] ==
-         NSHTTPCookieAcceptPolicyAlways;
+  return [system_store_ cookieAcceptPolicy] != NSHTTPCookieAcceptPolicyNever;

[Eugene But (OOO till 7-30), 2017/02/10 00:17:01]

This will return YES if 3rd party cookies are blocked. Is it ok? Should
|CrNetEnvironment::InitializeOnNetworkThread| set
|NSHTTPCookieAcceptPolicyAlways| policy to |sharedHTTPCookieStorage| instead?

[lilyhoughton, 2017/02/10 16:41:18]

What is the specific issue that this change fixes?

[mef, 2017/02/10 17:04:59]

Done.

[mef, 2017/02/10 17:04:59]

It broke Cronet cookie tests. 
I've entered crbug.com/690969 to track this. 
I think we should change Cronet behavior, but first I want to restore existing
functionality.

 }
 
 void CookieStoreIOS::WriteToCookieMonster(NSArray* system_cookies) {
   DCHECK(thread_checker_.CalledOnValidThread());
   // Copy the cookies from the global cookie store to |cookie_monster_|.
   // Unlike the system store, CookieMonster requires unique creation times.
   net::CookieList cookie_list;
   NSUInteger cookie_count = [system_cookies count];
   cookie_list.reserve(cookie_count);
   for (NSHTTPCookie* cookie in system_cookies) {
@@ skipping 211 matching lines @@
   net::CookieList cookie_list;
   cookie_list.reserve([cookies count]);
   for (NSHTTPCookie* cookie in cookies) {
     base::Time created = creation_time_manager_->GetCreationTime(cookie);
     cookie_list.push_back(CanonicalCookieFromSystemCookie(cookie, created));
   }
   return cookie_list;
 }
 
 }  // namespace net