Switch the command line Dart-based analyzer back to the synchronous API.
Switch the command line Dart-based analyzer back to the synchronous API.

This improves timing for dart2js analysis from 8000 ms to 7700 ms (vs. 7300 ms for Java-based analyzer).

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//210463002

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@34332 260f80e4-7a28-3924-810f-c04153c831b5

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