Update repo to use dart2js from pkg/compiler.

runtime/vm/unit_test.cc

Index: runtime/vm/unit_test.cc
diff --git a/runtime/vm/unit_test.cc b/runtime/vm/unit_test.cc
index 6518b3aeee5711a773af6834ef5dd397e7b5983e..c7127e0549a5e28aa8fb746030ce5a24d76501f0 100644
--- a/runtime/vm/unit_test.cc
+++ b/runtime/vm/unit_test.cc
@@ -48,6 +48,23 @@ void TestCaseBase::RunAll() {
   }
 }
 
+static const char* kPackageScheme = "package:";
+
+static bool IsPackageSchemeURL(const char* url_name) {
+  static const intptr_t kPackageSchemeLen = strlen(kPackageScheme);
+  return (strncmp(url_name, kPackageScheme, kPackageSchemeLen) == 0);
+}
+
+static Dart_Handle ResolvePackageUri(Dart_Handle builtin_lib,
+                                     const char* uri_chars) {
+  const int kNumArgs = 1;
+  Dart_Handle dart_args[kNumArgs];
+  dart_args[0] = DartUtils::NewString(uri_chars);
+  return Dart_Invoke(builtin_lib,
+                     DartUtils::NewString("_filePathFromUri"),
+                     kNumArgs,
+                     dart_args);
+}
 
 static Dart_Handle LibraryTagHandler(Dart_LibraryTag tag,
                                      Dart_Handle library,
@@ -108,6 +125,15 @@ static Dart_Handle LibraryTagHandler(Dart_LibraryTag tag,
                                                url_chars),
                            0, 0);
   }
+  if (IsPackageSchemeURL(url_chars)) {
+    Dart_Handle resolved_uri = ResolvePackageUri(builtin_lib, url_chars);
+    DART_CHECK_VALID(resolved_uri);
+    url_chars = NULL;
+    Dart_Handle result = Dart_StringToCString(resolved_uri, &url_chars);
+    if (Dart_IsError(result)) {
+      return Dart_NewApiError("accessing url characters failed");
+    }
+  }
   // Do sync loading since unit_test doesn't support async.
   Dart_Handle source = DartUtils::ReadStringFromFile(url_chars);
   EXPECT_VALID(source);