[chromedriver] Use CloseWebView() to close DevTools UI

chrome/test/chromedriver/chrome/devtools_http_client.cc

Index: chrome/test/chromedriver/chrome/devtools_http_client.cc
diff --git a/chrome/test/chromedriver/chrome/devtools_http_client.cc b/chrome/test/chromedriver/chrome/devtools_http_client.cc
index 7f3a49e9f134a84bcc6988b02f00c09dec90a72a..b49c3a39a8bf9543e3b6f244035e95adfb6493f6 100644
--- a/chrome/test/chromedriver/chrome/devtools_http_client.cc
+++ b/chrome/test/chromedriver/chrome/devtools_http_client.cc
@@ -191,10 +191,7 @@ Status DevToolsHttpClient::CloseFrontends(const std::string& for_client_id) {
       return status;
 
     scoped_ptr<base::Value> result;
-    status = web_view->EvaluateScript(
-        std::string(),
-        "document.querySelector('*[id^=\"close-button-\"]').click();",
-        &result);
+    status = CloseWebView(*it);
     // Ignore disconnected error, because it may be closed already.
     if (status.IsError() && status.code() != kDisconnected)
       return status;