Issue 21618. Fix for empty code for 'dynamic' type.

R=brianwilkerson@google.com
BUG= https://code.google.com/p/dart/issues/detail?id=21618

Review URL: https://codereview.chromium.org//731313004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41838 260f80e4-7a28-3924-810f-c04153c831b5
Improvements and tests for top-level variables matching.

It is OK to reorder them.
But it is not OK to change number of them or their types.

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//719383003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41839 260f80e4-7a28-3924-810f-c04153c831b5
Restructure inlining of Bigint accessors, use consistent approach, fixes a potential crash.

R=regis@google.com

Review URL: https://codereview.chromium.org//736113002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41840 260f80e4-7a28-3924-810f-c04153c831b5