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

chrome/browser/ui/browser_command_controller.cc

Index: chrome/browser/ui/browser_command_controller.cc
diff --git a/chrome/browser/ui/browser_command_controller.cc b/chrome/browser/ui/browser_command_controller.cc
index c316c7e384067dd0a866f1245adcc4cdf07e5129..c0268ffa734d1e1fecdfbf95f4fbae226ce33d1f 100644
--- a/chrome/browser/ui/browser_command_controller.cc
+++ b/chrome/browser/ui/browser_command_controller.cc
@@ -485,7 +485,7 @@ void BrowserCommandController::ExecuteCommandWithDisposition(
       CreateApplicationShortcuts(browser_);
       break;
     case IDC_DEV_TOOLS:
-      ToggleDevToolsWindow(browser_, DEVTOOLS_TOGGLE_ACTION_NONE);
+      ToggleDevToolsWindow(browser_, DEVTOOLS_TOGGLE_ACTION_SHOW);
       break;
     case IDC_DEV_TOOLS_CONSOLE:
       ToggleDevToolsWindow(browser_, DEVTOOLS_TOGGLE_ACTION_SHOW_CONSOLE);
@@ -493,6 +493,9 @@ void BrowserCommandController::ExecuteCommandWithDisposition(
     case IDC_DEV_TOOLS_INSPECT:
       ToggleDevToolsWindow(browser_, DEVTOOLS_TOGGLE_ACTION_INSPECT);
       break;
+    case IDC_DEV_TOOLS_TOGGLE:
+      ToggleDevToolsWindow(browser_, DEVTOOLS_TOGGLE_ACTION_TOGGLE);
+      break;
     case IDC_TASK_MANAGER:
       OpenTaskManager(browser_, false);
       break;
@@ -926,6 +929,8 @@ void BrowserCommandController::UpdateCommandsForDevTools() {
                                         dev_tools_enabled);
   command_updater_.UpdateCommandEnabled(IDC_DEV_TOOLS_INSPECT,
                                         dev_tools_enabled);
+  command_updater_.UpdateCommandEnabled(IDC_DEV_TOOLS_TOGGLE,
+                                        dev_tools_enabled);
 }
 
 void BrowserCommandController::UpdateCommandsForBookmarkEditing() {