Drop support for old SDK and shelf versions.

Drop support for old SDK and shelf versions.

This allows us to get rid of a lot of old hacks.

R=kevmoo@google.com

Committed: https://github.com/dart-lang/test/commit/a635337bce85dd49ed74a24eeb6dc9c8ed7652ed

[kevmoo, 2015-08-12 22:14:05]

LGTM

while you're at it, update usages of Platform.executable in test/io.dart

in _pubPath
in runDart

...this fixes remaining issues for running 'dart bin/test.dart' for 'dart' on
user path

https://codereview.chromium.org/1290763003/diff/20001/CHANGELOG.md
File CHANGELOG.md (right):

https://codereview.chromium.org/1290763003/diff/20001/CHANGELOG.md#newcode3
CHANGELOG.md:3: * Narrow the constraints on the Dart SDK and `shelf`, allowing
`test` to remove
Something like "require SDK >= XYZ and shelf => ABC to eliminate workarounds"

be explicit about how things are bumped

[nweiz, 2015-08-13 18:10:43]

Code review changes

[nweiz, 2015-08-13 18:11:11]

https://codereview.chromium.org/1290763003/diff/20001/CHANGELOG.md
File CHANGELOG.md (right):

https://codereview.chromium.org/1290763003/diff/20001/CHANGELOG.md#newcode3
CHANGELOG.md:3: * Narrow the constraints on the Dart SDK and `shelf`, allowing
`test` to remove
On 2015/08/12 22:14:04, kevmoo wrote:
> Something like "require SDK >= XYZ and shelf => ABC to eliminate workarounds"
> 
> be explicit about how things are bumped

Done.

[nweiz, 2015-08-13 18:11:24]

Committed patchset #3 (id:40001) manually as
a635337bce85dd49ed74a24eeb6dc9c8ed7652ed (presubmit successful).