- Modify dart_api.h to be a proper C API.

runtime/bin/crypto.cc

Index: runtime/bin/crypto.cc
===================================================================
--- runtime/bin/crypto.cc	(revision 23447)
+++ runtime/bin/crypto.cc	(working copy)
@@ -26,7 +26,7 @@
     delete[] buffer;
     Dart_ThrowException(DartUtils::NewDartOSError());
   }
-  Dart_Handle result = Dart_NewTypedData(kUint8, count);
+  Dart_Handle result = Dart_NewTypedData(Dart_TypedData_kUint8, count);
   if (Dart_IsError(result)) {
     delete[] buffer;
     Dart_Handle error = DartUtils::NewString("Failed to allocate storage.");