Add lookupInScope to DeclarationMirror.

sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart

Index: sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart
diff --git a/sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart b/sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart
index 54e71ad4d3a285f4f69a3f913b27419a2191b4d3..a504221bfd048c04fd510b30c5e402ee1251b3a5 100644
--- a/sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart
+++ b/sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart
@@ -105,6 +105,12 @@ abstract class DeclarationMirror implements Mirror {
    * A list of the metadata associated with this declaration.
    */
   List<InstanceMirror> get metadata;
+
+  /**
+   * Looks up the potentially qualified [name] in the scope of this declaration.

[Andrei Mouravski, 2013/07/01 17:46:26]

What does "potentially qualified" mean?

Further, could you add a bit more documentation on what is meant by scope?
Perhaps say "lexical scope."

I would also add:

/**
 * ...
 * See also:
 * 
 * * [Lexical
Scope](https://www.dartlang.org/docs/dart-up-and-running/contents/ch02.html#ch02-lexical-scope)
in Dart Up and Running.
 * * [Lexical
Scoping](http://www.dartlang.org/docs/spec/latest/dart-language-specification.html#h.jb82efuudrc5)
in the Dart Specification.
 */

[Johnni Winther, 2013/07/03 05:47:57]

Done.

+   * For methods and constructors, the scope includes the parameters.

[sra1, 2013/07/01 18:57:30]

For parameterized classes, does the scope include the type parameters?

[Johnni Winther, 2013/07/03 05:47:57]

Yes. Added note in the documentation.

+   */
+  DeclarationMirror lookupInScope(String name);
 }
 
 abstract class ObjectMirror implements Mirror {