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

mojo/edk/embedder/test_embedder.h

Index: mojo/edk/embedder/test_embedder.h
diff --git a/third_party/mojo/src/mojo/edk/embedder/test_embedder.h b/mojo/edk/embedder/test_embedder.h
similarity index 60%
copy from third_party/mojo/src/mojo/edk/embedder/test_embedder.h
copy to mojo/edk/embedder/test_embedder.h
index 3591bd7f3171a42a760f53e9ccb5fe84e372b818..c64ba179e1de0af5fb76975cb6c14cabd83e6766 100644
--- a/third_party/mojo/src/mojo/edk/embedder/test_embedder.h
+++ b/mojo/edk/embedder/test_embedder.h
@@ -2,19 +2,15 @@
 // 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_EMBEDDER_TEST_EMBEDDER_H_
-#define THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_TEST_EMBEDDER_H_
+#ifndef MOJO_EDK_EMBEDDER_TEST_EMBEDDER_H_
+#define MOJO_EDK_EMBEDDER_TEST_EMBEDDER_H_
 
-#include "third_party/mojo/src/mojo/edk/system/system_impl_export.h"
+#include "mojo/edk/system/system_impl_export.h"
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 namespace test {
 
-// Calls |Init()| with a |SimplePlatformSupport| (use this in tests if, e.g.,
-// you don't care about sandboxing, etc.).
-MOJO_SYSTEM_IMPL_EXPORT void InitWithSimplePlatformSupport();
-
 // This shuts down the global, singleton instance. (Note: "Real" embedders are
 // not expected to ever shut down this instance. This |Shutdown()| function will
 // do more work to ensure that tests don't leak, etc.) Returns true if there
@@ -26,7 +22,7 @@ MOJO_SYSTEM_IMPL_EXPORT void InitWithSimplePlatformSupport();
 MOJO_SYSTEM_IMPL_EXPORT bool Shutdown();
 
 }  // namespace test
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo
 
-#endif  // THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_TEST_EMBEDDER_H_
+#endif  // MOJO_EDK_EMBEDDER_TEST_EMBEDDER_H_