Replaced webPageOrderedClose with WebStateDelegate API.

ios/web/web_state/web_state_impl.mm

Index: ios/web/web_state/web_state_impl.mm
diff --git a/ios/web/web_state/web_state_impl.mm b/ios/web/web_state/web_state_impl.mm
index 7bd6758722a6a1c4ee415e3316a3dd44ce5ce8a5..e41fdeab7e0b3a0f1112eb053d836dadc9d69633 100644
--- a/ios/web/web_state/web_state_impl.mm
+++ b/ios/web/web_state/web_state_impl.mm
@@ -514,6 +514,12 @@ WebState* WebStateImpl::CreateNewWebState(const GURL& url,
   return nullptr;
 }
 
+void WebStateImpl::CloseWebState() {
+  if (delegate_) {
+    return delegate_->CloseWebState(this);

[rohitrao (ping after 24h), 2017/03/13 12:30:02]

Any need for "return" if this method returns void?

[Eugene But (OOO till 7-30), 2017/03/14 01:20:24]

Done.

+  }
+}
+
 void WebStateImpl::OnAuthRequired(
     NSURLProtectionSpace* protection_space,
     NSURLCredential* proposed_credential,