- Do not keep the environment alive past the process spawn. - Avoid creation of many temp objects while creating the process   environment. - "if (identical(true, value))" makes no sense.
- Do not keep the environment alive past the process spawn.
- Avoid creation of many temp objects while creating the process
  environment.
- "if (identical(true, value))" makes no sense.

R=asiva@google.com

Review URL: https://codereview.chromium.org//232223004

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@34907 260f80e4-7a28-3924-810f-c04153c831b5

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