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 98%
copy from third_party/mojo/src/mojo/edk/embedder/configuration.h
copy to mojo/edk/embedder/configuration.h
index 0f99e1f2c42c6dbdd3c6a47453a084e268f28fa4..c63d01840bf17f7a0d2b9f6218162d037598218c 100644
--- a/third_party/mojo/src/mojo/edk/embedder/configuration.h
+++ b/mojo/edk/embedder/configuration.h
@@ -8,7 +8,7 @@
 #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  // MOJO_EDK_EMBEDDER_CONFIGURATION_H_