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

mojo/edk/embedder/simple_platform_support.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 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"
 
 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
 // has no state, and different instances of |SimplePlatformSupport| are mutually
 // compatible (i.e., you don't need to use a single instance of it everywhere --
 // you may simply create one whenever/wherever you need it).
 class MOJO_SYSTEM_IMPL_EXPORT SimplePlatformSupport final
     : public PlatformSupport {
  public:
   SimplePlatformSupport() {}
   ~SimplePlatformSupport() override {}
 
   void GetCryptoRandomBytes(void* bytes, size_t num_bytes) override;
   PlatformSharedBuffer* CreateSharedBuffer(size_t num_bytes) override;
   PlatformSharedBuffer* CreateSharedBufferFromHandle(
       size_t num_bytes,
       ScopedPlatformHandle platform_handle) override;
 
  private:
   MOJO_DISALLOW_COPY_AND_ASSIGN(SimplePlatformSupport);
 };
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_EMBEDDER_SIMPLE_PLATFORM_SUPPORT_H_