Moved |openedByDOM| to WebState's CreateParams and public interface.

ios/web/web_state/web_state_impl_unittest.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.
 
 #import "ios/web/web_state/web_state_impl.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 144 matching lines @@
   EXPECT_TRUE(expected_value->Equals(&value));
   EXPECT_EQ(expected_url, url);
   return should_handle;
 }
 
 }  // namespace
 
 // Test fixture for web::WebStateImpl class.
 class WebStateImplTest : public web::WebTest {
  protected:
-  WebStateImplTest() : web_state_(new WebStateImpl(GetBrowserState())) {}
+  WebStateImplTest() : web::WebTest() {
+    web::WebState::CreateParams params(GetBrowserState());
+    web_state_ = base::MakeUnique<web::WebStateImpl>(params);
+  }
 
   std::unique_ptr<WebStateImpl> web_state_;
 };
 
 TEST_F(WebStateImplTest, WebUsageEnabled) {
   // Default is false.
   ASSERT_FALSE(web_state_->IsWebUsageEnabled());
 
   web_state_->SetWebUsageEnabled(true);
   EXPECT_TRUE(web_state_->IsWebUsageEnabled());
@@ skipping 492 matching lines @@
   // Check that a false return value is forwarded correctly.
   EXPECT_FALSE(
       web_state_->OnScriptCommandReceived(kCommand2, value_2, kUrl2, false));
   EXPECT_FALSE(is_called_1);
   EXPECT_TRUE(is_called_2);
 
   web_state_->RemoveScriptCommandCallback(kPrefix2);
 }
 
 }  // namespace web