Change lookup path for Dart native extensions shared libraries.

runtime/bin/builtin.dart

Index: runtime/bin/builtin.dart
diff --git a/runtime/bin/builtin.dart b/runtime/bin/builtin.dart
index b495346bf3aaae0925b368dbfcd23fe5bb82bdee..98bf99a0ce4f96550e63b5e3f16ee7568e988fde 100644
--- a/runtime/bin/builtin.dart
+++ b/runtime/bin/builtin.dart
@@ -65,7 +65,21 @@ String resolveUri(String base, String userString) {
   _logResolution("# Resolving: $userString from $base");
   var resolved = baseUri.resolve(userString);
   _logResolution("# Resolved to: $resolved");
-  return resolved.toString(); 
+  return resolved.toString();
+}
+
+String resolveExtensionUri(String base, String userString) {
+  var uri = new Uri.fromString(userString);

[Ivan Posva, 2012/03/15 16:18:20]

Please add comments why dart-ext URIs need special handling.

[Bill Hesse, 2012/04/17 14:46:31]

This special function has been dropped, and its functionality merged into
_resolveUri.

+  if ("dart-ext" != uri.scheme) {
+    throw "Not a Dart extension uri: $uri";
+  }
+  var schemelessUri = new Uri(path: uri.path);
+  var baseUri = new Uri.fromString(base);
+  _logResolution("# Resolving: $userString from $base");
+  var resolved = baseUri.resolveUri(schemelessUri);
+  resolved = new Uri(scheme: 'dart-ext', path: resolved.path);
+  _logResolution("# Resolved to: $resolved");
+  return resolved.toString();
 }
 
 String filePathFromUri(String userUri) {

[Ivan Posva, 2012/03/15 16:18:20]

This function essentially does what you are doing manually in C++ under ifdef.

[Bill Hesse, 2012/04/17 14:46:31]

Yes, and with a refactoring, the existing call of this function does the right
thing for the extensions case as well.