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

mojo/runner/platform_handle_impl.cc

Index: mojo/runner/platform_handle_impl.cc
diff --git a/mojo/runner/platform_handle_impl.cc b/mojo/runner/platform_handle_impl.cc
index c5e79997a5f140b02075f4cc3057c098431def72..dab5c13eec525c81e844bffa97cb00022d7f1d7f 100644
--- a/mojo/runner/platform_handle_impl.cc
+++ b/mojo/runner/platform_handle_impl.cc
@@ -3,24 +3,43 @@
 // found in the LICENSE file.
 
 #include "mojo/platform_handle/platform_handle.h"
+
+#if defined(USE_CHROME_EDK)
+#include "mojo/edk/embedder/embedder.h"
+#else
 #include "third_party/mojo/src/mojo/edk/embedder/embedder.h"
+#endif
 
 extern "C" {
 
 MojoResult MojoCreatePlatformHandleWrapper(MojoPlatformHandle platform_handle,
                                            MojoHandle* wrapper) {
+#if defined(USE_CHROME_EDK)
+  mojo::edk::PlatformHandle platform_handle_wrapper(platform_handle);
+  mojo::edk::ScopedPlatformHandle scoped_platform_handle(
+      platform_handle_wrapper);
+  return mojo::edk::CreatePlatformHandleWrapper(
+      scoped_platform_handle.Pass(), wrapper);
+#else
   mojo::embedder::PlatformHandle platform_handle_wrapper(platform_handle);
   mojo::embedder::ScopedPlatformHandle scoped_platform_handle(
       platform_handle_wrapper);
   return mojo::embedder::CreatePlatformHandleWrapper(
       scoped_platform_handle.Pass(), wrapper);
+#endif
 }
 
 MojoResult MojoExtractPlatformHandle(MojoHandle wrapper,
                                      MojoPlatformHandle* platform_handle) {
+#if defined(USE_CHROME_EDK)
+  mojo::edk::ScopedPlatformHandle scoped_platform_handle;
+  MojoResult result = mojo::edk::PassWrappedPlatformHandle(
+      wrapper, &scoped_platform_handle);
+#else
   mojo::embedder::ScopedPlatformHandle scoped_platform_handle;
   MojoResult result = mojo::embedder::PassWrappedPlatformHandle(
       wrapper, &scoped_platform_handle);
+#endif
   if (result != MOJO_RESULT_OK)
     return result;