Mark analyze_dart2js_test as slow and remove slow marker for the test affected by issue 6658 (fixed).
Mark analyze_dart2js_test as slow and remove slow marker for the test affected by issue 6658 (fixed).

R=ricow@google.com
BUG=

Review URL: https://codereview.chromium.org//23620025

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@27091 260f80e4-7a28-3924-810f-c04153c831b5

dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk