'Convert Method to Getter' refactoring implementation.

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//592643002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40541 260f80e4-7a28-3924-810f-c04153c831b5
Reset refactoring manager on any analysis.

R=brianwilkerson@google.com
BUG=

Review URL: https://codereview.chromium.org//589843002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40542 260f80e4-7a28-3924-810f-c04153c831b5
cherry pick https://github.com/Polymer/ShadowDOM/pull/506

BUG= http://dartbug.com/21033

Review URL: https://codereview.chromium.org//587423002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40543 260f80e4-7a28-3924-810f-c04153c831b5