Close detached DevTools window (rather than open a new instance) when it receives an F12 keypress

chrome/browser/debugger/devtools_sanity_browsertest.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 "base/bind.h"
 #include "base/cancelable_callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/path_service.h"
@@ skipping 365 matching lines @@
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(&WaitForFirstSharedWorkerOnIOThread, worker_data));
     content::RunMessageLoop();
     return worker_data;
   }
 
   void OpenDevToolsWindowForSharedWorker(WorkerData* worker_data) {
     Profile* profile = browser()->profile();
     window_ = DevToolsWindow::CreateDevToolsWindowForWorker(profile);
-    window_->Show(DEVTOOLS_TOGGLE_ACTION_NONE);
+    window_->Show(DEVTOOLS_TOGGLE_ACTION_SHOW);
     DevToolsAgentHost* agent_host =
         DevToolsAgentHostRegistry::GetDevToolsAgentHostForWorker(
             worker_data->worker_process_id,
             worker_data->worker_route_id);
     DevToolsManager::GetInstance()->RegisterDevToolsClientHostFor(
         agent_host,
         window_->devtools_client_host());
     RenderViewHost* client_rvh = window_->GetRenderViewHost();
     WebContents* client_contents = WebContents::FromRenderViewHost(client_rvh);
     if (client_contents->IsLoading()) {
@@ skipping 214 matching lines @@
                                         content::CONSOLE_MESSAGE_LEVEL_LOG,
                                         "log");
   devtools_manager->AddMessageToConsole(agent_host,
                                         content::CONSOLE_MESSAGE_LEVEL_ERROR,
                                         "error");
   RunTestFunction(window_, "checkLogAndErrorMessages");
   CloseDevToolsWindow();
 }
 
 }  // namespace