Fix include/import in ios/testing and ios/chrome/test

ios/chrome/test/app/signin_test_util.mm

 // Copyright 2016 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/chrome/test/app/signin_test_util.h"
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
-#include "base/test/ios/wait_util.h"
+#import "base/test/ios/wait_util.h"
 #include "components/prefs/pref_service.h"
 #include "components/signin/core/browser/account_tracker_service.h"
 #include "components/signin/core/common/signin_pref_names.h"
 #include "google_apis/gaia/gaia_constants.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/signin/account_tracker_service_factory.h"
-#include "ios/chrome/browser/signin/authentication_service.h"
+#import "ios/chrome/browser/signin/authentication_service.h"
 #include "ios/chrome/browser/signin/authentication_service_factory.h"
 #include "ios/chrome/browser/signin/gaia_auth_fetcher_ios.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
-#include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
+#import "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #import "ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "net/url_request/url_request_status.h"
 
 namespace {
 
 net::FakeURLFetcherFactory* gFakeURLFetcherFactory = nullptr;
 
@@ skipping 130 matching lines @@
   NSDate* deadline = [NSDate dateWithTimeIntervalSinceNow:10.0];
   while (identity_service->HasIdentities() &&
          [[NSDate date] compare:deadline] != NSOrderedDescending) {
     base::test::ios::SpinRunLoopWithMaxDelay(
         base::TimeDelta::FromSecondsD(0.01));
   }
   return !identity_service->HasIdentities();
 }
 
 }  // namespace chrome_test_util