Fix mock SDK used by analyzer2dart.
Fix mock SDK used by analyzer2dart.

Revision 43366 makes analyzer depend on Future having exactly one type
parameter.

TBR=brianwilkerson@google.com

Review URL: https://codereview.chromium.org//898453006

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@43373 260f80e4-7a28-3924-810f-c04153c831b5

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