Eliminate the old non blink code paths from idl generation

During the transition to the dart:html dart:blink split, we needed to support generating the old style and the new style.  This CL eliminates the code paths for the old style generation now that they're no longer needed.

BUG=
R=efortuna@google.com

Review URL: https://codereview.chromium.org//450693005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39005 260f80e4-7a28-3924-810f-c04153c831b5
DEPS AutoUpdate: webkit to 179747 (2014-08-07 22:02:13 +0200) leafp@google.com
Eliminate dart_use_blink parameter from idl generation
http://src.chromium.org/viewvc/blink?view=rev&revision=179747

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39006 260f80e4-7a28-3924-810f-c04153c831b5
Code generate integration test methods for synchronous request/response pairs.

These methods take care of validating requests and responses (unless
the optional argument 'checkTypes' is false); this should make writing
integration tests easier and less error-prone.

R=jwren@google.com

Review URL: https://codereview.chromium.org//451483005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39007 260f80e4-7a28-3924-810f-c04153c831b5