Fix include import in ios/web

ios/web/web_state/js/core_js_unittest.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 <vector>
 #import <Foundation/Foundation.h>
 
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #import "ios/web/public/test/web_test_with_web_state.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "testing/gtest_mac.h"
+#import "testing/gtest_mac.h"
 
 // Unit tests for ios/web/web_state/js/resources/core.js.
 
 namespace {
 
 struct TestScriptAndExpectedValue {
   NSString* test_script;
   id expected_value;
 };
 
@@ skipping 247 matching lines @@
     expected_result = @{
       @"src" : [NSString stringWithFormat:@"%sfoo", BaseUrl().c_str()],
       @"referrerPolicy" : @"default",
     };
     // Make sure the returned JSON does not have an 'href' key.
     EXPECT_NSEQ(expected_result, result);
   }
 }
 
 }  // namespace web