Make Dart_LoadLibrary and Dart_LoadSource take line and column offsets like Dart_LoadScript.

runtime/bin/dartutils.cc

Index: runtime/bin/dartutils.cc
diff --git a/runtime/bin/dartutils.cc b/runtime/bin/dartutils.cc
index 99487f570ec52c3ea0a8a7540ef607dcf64e259f..8b16ab37bd9ad2b179e205bc9de96915b544b58b 100644
--- a/runtime/bin/dartutils.cc
+++ b/runtime/bin/dartutils.cc
@@ -504,7 +504,7 @@ Dart_Handle DartUtils::LibraryTagHandler(Dart_LibraryTag tag,
       return Dart_LoadSource(
           library,
           part_uri_obj,
-          Builtin::PartSource(Builtin::kIOLibrary, url_string));
+          Builtin::PartSource(Builtin::kIOLibrary, url_string), 0, 0);
     } else {
       ASSERT(tag == Dart_kImportTag);
       return NewError("Unable to import '%s' ", url_string);
@@ -744,12 +744,12 @@ void FUNCTION_NAME(Builtin_LoadLibrarySource)(Dart_NativeArguments args) {
 
   Dart_Handle result;
   if (tag == Dart_kImportTag) {
-    result = Dart_LoadLibrary(resolved_script_uri, sourceText);
+    result = Dart_LoadLibrary(resolved_script_uri, sourceText, 0, 0);
   } else {
     ASSERT(tag == Dart_kSourceTag);
     Dart_Handle library = Dart_LookupLibrary(library_uri);
     DART_CHECK_VALID(library);
-    result = Dart_LoadSource(library, resolved_script_uri, sourceText);
+    result = Dart_LoadSource(library, resolved_script_uri, sourceText, 0, 0);
   }
   if (Dart_IsError(result)) {
     // TODO(hausner): If compilation/loading errors are supposed to
@@ -793,9 +793,9 @@ Dart_Handle DartUtils::LoadSource(Dart_Handle library,
   // Load it according to the specified tag.
   if (tag == Dart_kImportTag) {
     // Return library object or an error string.
-    return Dart_LoadLibrary(url, source);
+    return Dart_LoadLibrary(url, source, 0, 0);
   } else if (tag == Dart_kSourceTag) {
-    return Dart_LoadSource(library, url, source);
+    return Dart_LoadSource(library, url, source, 0, 0);
   }
   return Dart_NewApiError("wrong tag");
 }