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

chrome/browser/ui/views/external_tab_container_win.cc

Index: chrome/browser/ui/views/external_tab_container_win.cc
diff --git a/chrome/browser/ui/views/external_tab_container_win.cc b/chrome/browser/ui/views/external_tab_container_win.cc
index 841baaafc0b6745e85b676f95c9ae5b648b2d993..51651595a0f90c4d9ccc967e8bc494b444cd260e 100644
--- a/chrome/browser/ui/views/external_tab_container_win.cc
+++ b/chrome/browser/ui/views/external_tab_container_win.cc
@@ -1061,7 +1061,7 @@ bool ExternalTabContainerWin::AcceleratorPressed(
     case IDC_DEV_TOOLS:
       DevToolsWindow::ToggleDevToolsWindow(
           tab_contents_->web_contents()->GetRenderViewHost(),
-          DEVTOOLS_TOGGLE_ACTION_NONE);
+          DEVTOOLS_TOGGLE_ACTION_SHOW);
       break;
     case IDC_DEV_TOOLS_CONSOLE:
       DevToolsWindow::ToggleDevToolsWindow(
@@ -1073,6 +1073,11 @@ bool ExternalTabContainerWin::AcceleratorPressed(
           tab_contents_->web_contents()->GetRenderViewHost(),
           DEVTOOLS_TOGGLE_ACTION_INSPECT);
       break;
+    case IDC_DEV_TOOLS_TOGGLE:
+      DevToolsWindow::ToggleDevToolsWindow(
+          tab_contents_->web_contents()->GetRenderViewHost(),
+          DEVTOOLS_TOGGLE_ACTION_TOGGLE);
+      break;
     default:
       NOTREACHED() << "Unsupported accelerator: " << command_id;
       return false;