Move implementation of dart:mojo.internal to mojo/public/platform/dart

mojo/public/platform/dart/mojo_natives.cc

Index: mojo/public/platform/dart/mojo_natives.cc
diff --git a/mojo/dart/embedder/mojo_natives.cc b/mojo/public/platform/dart/mojo_natives.cc
similarity index 99%
rename from mojo/dart/embedder/mojo_natives.cc
rename to mojo/public/platform/dart/mojo_natives.cc
index f1938372defe83f23ec0e64071a64b973a5b34a7..8739db4034b7fc39a619534d8d9f988ec9327bd8 100644
--- a/mojo/dart/embedder/mojo_natives.cc
+++ b/mojo/public/platform/dart/mojo_natives.cc
@@ -9,7 +9,6 @@
 #include <vector>
 
 #include "dart/runtime/include/dart_api.h"
-#include "mojo/dart/embedder/builtin.h"
 #include "mojo/public/c/system/core.h"
 #include "mojo/public/cpp/environment/logging.h"
 #include "mojo/public/cpp/system/core.h"
@@ -18,6 +17,11 @@
 namespace mojo {
 namespace dart {
 
+#define REGISTER_FUNCTION(name, count)                                         \
+  { "" #name, name, count },
+#define DECLARE_FUNCTION(name, count)                                          \
+  extern void name(Dart_NativeArguments args);
+
 #define MOJO_NATIVE_LIST(V)                \
   V(MojoSharedBuffer_Create, 2)            \
   V(MojoSharedBuffer_Duplicate, 2)         \