Remove user agent from HeadlessBrowserContextOptions.

headless/lib/browser/headless_browser_context_impl.cc

 // Copyright 2015 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.
 
 #include "headless/lib/browser/headless_browser_context_impl.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 295 matching lines @@
 
 HeadlessBrowserContext::Builder::Builder(Builder&&) = default;
 
 HeadlessBrowserContext::Builder&
 HeadlessBrowserContext::Builder::SetProtocolHandlers(
     ProtocolHandlerMap protocol_handlers) {
   options_->protocol_handlers_ = std::move(protocol_handlers);
   return *this;
 }
 
-HeadlessBrowserContext::Builder& HeadlessBrowserContext::Builder::SetUserAgent(
-    const std::string& user_agent) {
-  options_->user_agent_ = user_agent;
-  return *this;
-}
-
 HeadlessBrowserContext::Builder&
 HeadlessBrowserContext::Builder::SetProductNameAndVersion(
     const std::string& product_name_and_version) {
   options_->product_name_and_version_ = product_name_and_version;
   return *this;
 }
 
 HeadlessBrowserContext::Builder&
 HeadlessBrowserContext::Builder::SetProxyServer(
     const net::HostPortPair& proxy_server) {
@@ skipping 80 matching lines @@
 HeadlessBrowserContext::Builder::MojoBindings::MojoBindings() {}
 
 HeadlessBrowserContext::Builder::MojoBindings::MojoBindings(
     const std::string& mojom_name,
     const std::string& js_bindings)
     : mojom_name(mojom_name), js_bindings(js_bindings) {}
 
 HeadlessBrowserContext::Builder::MojoBindings::~MojoBindings() {}
 
 }  // namespace headless