Add platform_app flag to manifest.

chrome/test/base/scoped_command_line_override.h

+// Copyright (c) 2011 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.
+
+#ifndef CHROME_TEST_BASE_SCOPED_COMMAND_LINE_OVERRIDE_H_
+#define CHROME_TEST_BASE_SCOPED_COMMAND_LINE_OVERRIDE_H_
+#pragma once
+
+#include <string>
+
+#include "base/command_line.h"
+
+// ScopedCommandLineOverride takes the CommandLine for the current
+// process, saves it, then alters it. When the instance of this class
+// goes out of scope, it restores CommandLine to its prior state. The
+// intended usage is to test something that requires a flag that's off
+// by default:
+//
+// ASSERT_TRUE(!Something::NotFullyBaked());
+// {
+//   ScopedCommandLineOverride override(switches:kEnableSomethingHalfBaked);
+//   ASSERT_TRUE(Something::NotFullyBaked());
+// }
+class ScopedCommandLineOverride {
+ public:
+  explicit ScopedCommandLineOverride(const std::string& new_switch);
+  virtual ~ScopedCommandLineOverride();
+ private:
+  CommandLine old_command_line_;
+};
+
+#endif  // CHROME_TEST_BASE_SCOPED_COMMAND_LINE_OVERRIDE_H_