Moved window opening callback to WebStateDelegate.

ios/web/web_state/web_state_delegate_bridge.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.
 
 #import "ios/web/public/web_state/web_state_delegate_bridge.h"
 
 #include "base/logging.h"
 #import "ios/web/public/web_state/context_menu_params.h"
 
 namespace web {
 
 WebStateDelegateBridge::WebStateDelegateBridge(id<CRWWebStateDelegate> delegate)
     : delegate_(delegate) {}
 
 WebStateDelegateBridge::~WebStateDelegateBridge() {}
 
+WebState* WebStateDelegateBridge::CreateNewWebState(WebState* source,
+                                                    const GURL& url,
+                                                    const GURL& opener_url,
+                                                    bool initiated_by_user) {
+  SEL selector =
+      @selector(webState:createNewWebStateForURL:openerURL:initiatedByUser:);
+  if ([delegate_ respondsToSelector:selector]) {
+    return [delegate_ webState:source
+        createNewWebStateForURL:url
+                      openerURL:opener_url
+                initiatedByUser:initiated_by_user];
+  }
+  return nullptr;
+}
+
 WebState* WebStateDelegateBridge::OpenURLFromWebState(
     WebState* source,
     const WebState::OpenURLParams& params) {
   if ([delegate_ respondsToSelector:@selector(webState:openURLWithParams:)])
     return [delegate_ webState:source openURLWithParams:params];
   return nullptr;
 }
 
 bool WebStateDelegateBridge::HandleContextMenu(
     WebState* source,
@@ skipping 45 matching lines @@
                            completionHandler:^(NSString* username,
                                                NSString* password) {
                              local_callback.Run(username, password);
                            }];
   } else {
     local_callback.Run(nil, nil);
   }
 }
 
 }  // web