Moved window opening callback to WebStateDelegate.

ios/web/public/test/crw_mock_web_state_delegate.h

 // 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.
 
 #ifndef IOS_WEB_PUBLIC_TEST_CRW_MOCK_WEB_STATE_DELEGATE_H_
 #define IOS_WEB_PUBLIC_TEST_CRW_MOCK_WEB_STATE_DELEGATE_H_
 
 #import "ios/testing/ocmock_complex_type_helper.h"
 #import "ios/web/public/web_state/web_state_delegate_bridge.h"
 
 // Stub implementation for CRWWebStateDelegate protocol.
 @interface CRWMockWebStateDelegate
     : OCMockComplexTypeHelper<CRWWebStateDelegate>
 // web::WebState::OpenURLParams in |webState:openURLWithParams:| call.
 @property(nonatomic, readonly)
     const web::WebState::OpenURLParams* openURLParams;
 // web::WebState received in delegate method calls.
 @property(nonatomic, readonly) web::WebState* webState;
 // ContextMenuParams reveived in |webState:handleContextMenu:| call.
 // nullptr if that delegate method was not called.
 @property(nonatomic, readonly) web::ContextMenuParams* contextMenuParams;
+// Whether |webState:createNewWebStateForURL:openerURL:initiatedByUser:| has
+// been called or not.
+@property(nonatomic, readonly) BOOL webStateCreationRequested;
 // Whether |webState:runRepostFormDialogWithCompletionHandler:| has been called
 // or not.
 @property(nonatomic, readonly) BOOL repostFormWarningRequested;
 // Whether |javaScriptDialogPresenterForWebState:| has been called or not.
 @property(nonatomic, readonly) BOOL javaScriptDialogPresenterRequested;
 // Whether |webState:didRequestHTTPAuthForProtectionSpace:...| has been called
 // or not.
 @property(nonatomic, readonly) BOOL authenticationRequested;
 
 @end
 
 #endif  // IOS_WEB_PUBLIC_TEST_CRW_MOCK_WEB_STATE_DELEGATE_H_