Implements extensions devtools API

chrome/browser/extensions/extension_devtools_browsertest.cc

Index: chrome/browser/extensions/extension_devtools_browsertest.cc
diff --git a/chrome/browser/extensions/extension_devtools_browsertest.cc b/chrome/browser/extensions/extension_devtools_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..85d34ac1b9aae8c1fbd783855acffbee8133ca72
--- /dev/null
+++ b/chrome/browser/extensions/extension_devtools_browsertest.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2009 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 "chrome/browser/extensions/extension_devtools_browsertest.h"
+
+#include "chrome/common/chrome_switches.h"
+
+void ExtensionDevToolsBrowserTest::SetUpCommandLine(CommandLine* command_line) {
+  ExtensionBrowserTest::SetUpCommandLine(command_line);
+
+  command_line->AppendSwitch(switches::kEnableExtensionTimelineApi);
+}
+
+