Add a Mojo EDK for Chrome that uses one OS pipe per message pipe.

mojo/edk/test/test_support_impl.h

 // Copyright 2014 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 THIRD_PARTY_MOJO_SRC_MOJO_EDK_TEST_TEST_SUPPORT_IMPL_H_
-#define THIRD_PARTY_MOJO_SRC_MOJO_EDK_TEST_TEST_SUPPORT_IMPL_H_
+#ifndef MOJO_EDK_TEST_TEST_SUPPORT_IMPL_H_
+#define MOJO_EDK_TEST_TEST_SUPPORT_IMPL_H_
 
 #include <stdio.h>
 
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/tests/test_support_private.h"
 
 namespace mojo {
+namespace edk {
 namespace test {
 
-class TestSupportImpl : public TestSupport {
+class TestSupportImpl : public mojo::test::TestSupport {
  public:
   TestSupportImpl();
   ~TestSupportImpl() override;
 
   void LogPerfResult(const char* test_name,
                      const char* sub_test_name,
                      double value,
                      const char* units) override;
   FILE* OpenSourceRootRelativeFile(const char* relative_path) override;
   char** EnumerateSourceRootRelativeDirectory(
       const char* relative_path) override;
 
  private:
   MOJO_DISALLOW_COPY_AND_ASSIGN(TestSupportImpl);
 };
 
 }  // namespace test
+}  // namespace edk
 }  // namespace mojo
 
-#endif  // THIRD_PARTY_MOJO_SRC_MOJO_EDK_TEST_TEST_SUPPORT_IMPL_H_
+#endif  // MOJO_EDK_TEST_TEST_SUPPORT_IMPL_H_