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

mojo/edk/embedder/simple_platform_support.cc

Index: mojo/edk/embedder/simple_platform_support.cc
diff --git a/third_party/mojo/src/mojo/edk/embedder/simple_platform_support.cc b/mojo/edk/embedder/simple_platform_support.cc
similarity index 88%
copy from third_party/mojo/src/mojo/edk/embedder/simple_platform_support.cc
copy to mojo/edk/embedder/simple_platform_support.cc
index 4207120fc7b91601c743c85f22f81a89e53b36f2..5eac98f1ee8e134d92b3a2645334d69e627a0baf 100644
--- a/third_party/mojo/src/mojo/edk/embedder/simple_platform_support.cc
+++ b/mojo/edk/embedder/simple_platform_support.cc
@@ -4,15 +4,15 @@
 
 #include "mojo/edk/embedder/simple_platform_support.h"
 
-#include "base/rand_util.h"
+#include "crypto/random.h"
 #include "mojo/edk/embedder/simple_platform_shared_buffer.h"
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 void SimplePlatformSupport::GetCryptoRandomBytes(void* bytes,
                                                  size_t num_bytes) {
-  base::RandBytes(bytes, num_bytes);
+  crypto::RandBytes(bytes, num_bytes);
 }
 
 PlatformSharedBuffer* SimplePlatformSupport::CreateSharedBuffer(
@@ -27,5 +27,5 @@ PlatformSharedBuffer* SimplePlatformSupport::CreateSharedBufferFromHandle(
       num_bytes, platform_handle.Pass());
 }
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo