Remove JavaStringBuilder

R=scheglov@google.com

Review URL: https://codereview.chromium.org//680863002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41305 260f80e4-7a28-3924-810f-c04153c831b5
Port enums AST changes to Dart.

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//679923002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41306 260f80e4-7a28-3924-810f-c04153c831b5
Add ENUM and ENUM_CONSTANT to the specification.

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//677333002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41307 260f80e4-7a28-3924-810f-c04153c831b5
Convert most of the EngineTestCase.createSource invocations into multi-line String literals.

There are sill invocations in Angular tests, but these call it with List<String>,
I will clean them up in the following CL.

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//682553002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41308 260f80e4-7a28-3924-810f-c04153c831b5