Added the CanvasImageSource interface, which all types that a canvas can draw

tools/testing/dart/vendored_pkg/args/args.dart

Index: tools/testing/dart/vendored_pkg/args/args.dart
diff --git a/tools/testing/dart/vendored_pkg/args/args.dart b/tools/testing/dart/vendored_pkg/args/args.dart
index 32793ddfc45be591c3383322dfcbbf1f2230ba39..29da1e262b840885b6d87c41474eec6aa6f0d418 100644
--- a/tools/testing/dart/vendored_pkg/args/args.dart
+++ b/tools/testing/dart/vendored_pkg/args/args.dart
@@ -331,7 +331,7 @@ class ArgParser {
    * that abbreviation.
    */
   Option findByAbbreviation(String abbr) {
-    return options.values.firstWhere((option) => option.abbreviation == abbr,
+    return options.values.firstMatching((option) => option.abbreviation == abbr,

[blois, 2013/03/14 16:24:10]

Shouldn't be checked in.

[Andrei Mouravski, 2013/03/15 00:08:52]

Done.

         orElse: () => null);
   }
 }