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

mojo/edk/embedder/simple_platform_support.h

Index: mojo/edk/embedder/simple_platform_support.h
diff --git a/third_party/mojo/src/mojo/edk/embedder/simple_platform_support.h b/mojo/edk/embedder/simple_platform_support.h
similarity index 73%
copy from third_party/mojo/src/mojo/edk/embedder/simple_platform_support.h
copy to mojo/edk/embedder/simple_platform_support.h
index 8974d2d748eb170d9f52d3be6c29336ef0bafc0e..ef97d91dd4983aeb5421c638e6424c4c1fac362b 100644
--- a/third_party/mojo/src/mojo/edk/embedder/simple_platform_support.h
+++ b/mojo/edk/embedder/simple_platform_support.h
@@ -2,15 +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_SIMPLE_PLATFORM_SUPPORT_H_
-#define THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SUPPORT_H_
+#ifndef MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SUPPORT_H_
+#define MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SUPPORT_H_
 
+#include "mojo/edk/embedder/platform_support.h"
+#include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/cpp/system/macros.h"
-#include "third_party/mojo/src/mojo/edk/embedder/platform_support.h"
-#include "third_party/mojo/src/mojo/edk/system/system_impl_export.h"
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 // A simple implementation of |PlatformSupport|, when sandboxing and
 // multiprocess support are not issues (e.g., in most tests). Note: This class
@@ -33,7 +33,7 @@ class MOJO_SYSTEM_IMPL_EXPORT SimplePlatformSupport final
   MOJO_DISALLOW_COPY_AND_ASSIGN(SimplePlatformSupport);
 };
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo
 
-#endif  // THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SUPPORT_H_
+#endif  // MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SUPPORT_H_