Remove redundant c_str() calls.

chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
diff --git a/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
index 69cfd8981ffdf9c04b3283b4fcd79c42b51c0751..2113a0ab440f81c33c4f91355cfef2660b453857 100644
--- a/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
@@ -774,7 +774,7 @@ void ChromeResourceDispatcherHostDelegate::OnResponseStarted(
 #if BUILDFLAG(ENABLE_EXTENSIONS)
   GURL webstore_url(extension_urls::GetWebstoreLaunchURL());
   if (request->url().SchemeIsHTTPOrHTTPS() &&
-      request->url().DomainIs(webstore_url.host().c_str())) {
+      request->url().DomainIs(webstore_url.host_piece())) {
     net::HttpResponseHeaders* response_headers = request->response_headers();
     if (response_headers &&
         !response_headers->HasHeaderValue("x-frame-options", "deny") &&