Add a menu item to content_shell to open devtools to make it more discoverable.

content/shell/shell_devtools_delegate.cc

 // Copyright (c) 2012 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 "content/shell/shell_devtools_delegate.h"
 
-#include <algorithm>
-
 #include "content/public/browser/devtools_http_handler.h"
 #include "grit/shell_resources.h"
 #include "net/base/tcp_listen_socket.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace content {
 
 ShellDevToolsDelegate::ShellDevToolsDelegate(
-    int port,
     net::URLRequestContextGetter* context_getter)
     : context_getter_(context_getter) {
   devtools_http_handler_ = DevToolsHttpHandler::Start(
-      new net::TCPListenSocketFactory("127.0.0.1", port),
+      new net::TCPListenSocketFactory("127.0.0.1", 0),
       "",
       context_getter_,
       this);
 }
 
 ShellDevToolsDelegate::~ShellDevToolsDelegate() {
 }
 
 void ShellDevToolsDelegate::Stop() {
   // The call below destroys this.
   devtools_http_handler_->Stop();
 }
 
 std::string ShellDevToolsDelegate::GetDiscoveryPageHTML() {
   return ResourceBundle::GetSharedInstance().GetRawDataResource(
       IDR_CONTENT_SHELL_DEVTOOLS_DISCOVERY_PAGE,
       ui::SCALE_FACTOR_NONE).as_string();
 }
 
 bool ShellDevToolsDelegate::BundlesFrontendResources() {
   return true;
 }
 
 std::string ShellDevToolsDelegate::GetFrontendResourcesBaseURL() {
   return "";
 }
 
 }  // namespace content