Implement Command Line Private extension API

chrome/browser/extensions/api/command_line_private/command_line_private_apitest.cc

+// Copyright 2013 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/command_line.h"
+#include "chrome/browser/extensions/extension_apitest.h"
+
+namespace {
+// This should be consistent with
+// chrome/test/data/extensions/api_test/command_line/basics/test.js.
+const char kTestCommandLineSwitch[] = "command-line-private-api-test-foo";
+}  // namespace
+
+class CommandLinePrivateApiTest : public ExtensionApiTest {
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ExtensionApiTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitch(kTestCommandLineSwitch);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(CommandLinePrivateApiTest, Basics) {
+  EXPECT_TRUE(RunComponentExtensionTest("command_line/basics")) << message_;
+}