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

mojo/edk/embedder/configuration.h

Index: mojo/edk/embedder/configuration.h
diff --git a/third_party/mojo/src/mojo/edk/embedder/configuration.h b/mojo/edk/embedder/configuration.h
similarity index 90%
copy from third_party/mojo/src/mojo/edk/embedder/configuration.h
copy to mojo/edk/embedder/configuration.h
index f02a13d4f7bc140e70e898f75ee5bef11e3e6b41..c63d01840bf17f7a0d2b9f6218162d037598218c 100644
--- a/third_party/mojo/src/mojo/edk/embedder/configuration.h
+++ b/mojo/edk/embedder/configuration.h
@@ -2,13 +2,13 @@
 // 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_CONFIGURATION_H_
-#define THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_CONFIGURATION_H_
+#ifndef MOJO_EDK_EMBEDDER_CONFIGURATION_H_
+#define MOJO_EDK_EMBEDDER_CONFIGURATION_H_
 
 #include <stddef.h>
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 // A set of constants that the Mojo system internally uses. These values should
 // be consistent across all processes on the same system.
@@ -62,7 +62,7 @@ struct Configuration {
   size_t max_shared_memory_num_bytes;
 };
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo
 
-#endif  // THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_CONFIGURATION_H_
+#endif  // MOJO_EDK_EMBEDDER_CONFIGURATION_H_