Makes subscriptions the active part of a stream, with the stream
itself being just an inert creator of subscriptions.

This changes the behavior of a "single subscription" stream to match
the documentation: After the subscription is canceled, you can't
resubscribe to the stream. Previously, you could do that, but it was
never documented or intended.
This also makes the stream of a StreamController not be paused while
before it's subscribed - it is always the subscription that is paused
or not, and while there is no subscription, the stream cannot be
paused. Previously the stream was set to paused until the first
subscription in order to prevent events from being lost. That is
handled independently of pauses now.

Adds StreamController.multiplex constructor. This name is tentative,
and likely to change. Its behavior may change as well. It currently
provides a new single-subscription stream each time its "stream"
getter is read, and you can subscribe to these.

Adds StreamIterator class that allows iterating over a stream's data
events using (async) "moveNext()" and "current", like a direct style
Iterator (sorry, it won't work in a for-in loop).

Review URL: https://codereview.chromium.org//16131003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23237 260f80e4-7a28-3924-810f-c04153c831b5

Reverts r23218, r23217, r23208, r23207, r23206, r23205, r23204.

r23218 | Path observer is listened more than once, so make it multiplex.
r23217 | Add StreamController.multiplex constructor.
r23208 | Fix bug in streamimpl
r23207 | Fix bug in stream iterator.
r23206 | Change expectations for http_parser_test.
r23205 | Fix bug in stream-impl.
r23204 | Make StreamSubscription be the active part of a string.

Review URL: https://codereview.chromium.org//15989006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23221 260f80e4-7a28-3924-810f-c04153c831b5

It is the one keeping the buffer of events, not the stream.

R=ajohnsen@google.com, floitsch@google.com, jmesserly@google.com

Review URL: https://codereview.chromium.org//14753009

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23204 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//16023007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23186 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//16039002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23184 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://codereview.chromium.org//16034002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23182 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//15701006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23160 260f80e4-7a28-3924-810f-c04153c831b5

BUG=

Review URL: https://codereview.chromium.org//15796003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23149 260f80e4-7a28-3924-810f-c04153c831b5

This also removed Process.runShell and adds a new flag: runInShell.

BUG=
R=kustermann@google.com, nweiz@google.com, sgjesse@google.com

Review URL: https://codereview.chromium.org//15883003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23131 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//15954002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23116 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=5104
R=nweiz@google.com

Review URL: https://codereview.chromium.org//15777002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23114 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//15741021

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23105 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=10665
R=nweiz@google.com

Review URL: https://codereview.chromium.org//15889005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23100 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//15902002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23098 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//15844004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23097 260f80e4-7a28-3924-810f-c04153c831b5

Cleans up pub a bit and in particular lets you do:

$ pub install --verbose

R=nweiz@google.com

Review URL: https://codereview.chromium.org//15444003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23035 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=10190
R=nweiz@google.com

Review URL: https://codereview.chromium.org//15347004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22913 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//14843025

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22825 260f80e4-7a28-3924-810f-c04153c831b5

BUG=7391
R=rnystrom@google.com

Review URL: https://codereview.chromium.org//15213002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22807 260f80e4-7a28-3924-810f-c04153c831b5

This also removes some unnecessary debugging logs from r22713.

TBR

Review URL: https://codereview.chromium.org//15184003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22720 260f80e4-7a28-3924-810f-c04153c831b5

This logging should help clear up the pub test timeouts we've been seeing. Some
of it should be removed once we don't need it anymore.

TBR

Review URL: https://codereview.chromium.org//15174005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22713 260f80e4-7a28-3924-810f-c04153c831b5

This involves creating a subclass of ScheduledProcess that takes the verbose
output and transforms it back into normal, non-verbose output.

R=blois@google.com

Review URL: https://codereview.chromium.org//14593010

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22708 260f80e4-7a28-3924-810f-c04153c831b5

BUG=6006
R=amouravski@google.com

Review URL: https://codereview.chromium.org//14914007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22656 260f80e4-7a28-3924-810f-c04153c831b5

R=amouravski@google.com

Review URL: https://codereview.chromium.org//15019016

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22577 260f80e4-7a28-3924-810f-c04153c831b5

R=dgrove@google.com

Review URL: https://codereview.chromium.org//15063002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22530 260f80e4-7a28-3924-810f-c04153c831b5

If you pass "--offline" to either, it will treat your system cache
as if it were the package server. Running update in offline also
prints a warning that you may have selected an older version of a
package.

BUG=https://code.google.com/p/dart/issues/detail?id=8262
R=nweiz@google.com

Review URL: https://codereview.chromium.org//14680005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22487 260f80e4-7a28-3924-810f-c04153c831b5

BUG=7075
R=rnystrom@google.com

Review URL: https://codereview.chromium.org//15047005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22484 260f80e4-7a28-3924-810f-c04153c831b5

This allows listDir to work properly with recursive symlinks on Windows.

BUG=7505
R=rnystrom@google.com

Review URL: https://codereview.chromium.org//14924006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22477 260f80e4-7a28-3924-810f-c04153c831b5

This is a user-facing error, so there shouldn't be a stack dump.

BUG=https://code.google.com/p/dart/issues/detail?id=10123
R=nweiz@google.com

Review URL: https://codereview.chromium.org//14662003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22448 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=9275
R=nweiz@google.com

Review URL: https://codereview.chromium.org//14762003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22447 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://codereview.chromium.org//14993002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22425 260f80e4-7a28-3924-810f-c04153c831b5

on HeaderValue and ContentType.

R=ajohnsen@google.com
BUG=

Review URL: https://codereview.chromium.org//14914002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22406 260f80e4-7a28-3924-810f-c04153c831b5

R=ager@google.com, rnystrom@google.com
BUG=https://code.google.com/p/dart/issues/detail?id=9503

Review URL: https://codereview.chromium.org//14589012

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22327 260f80e4-7a28-3924-810f-c04153c831b5

Reverts r22295.

Review URL: https://codereview.chromium.org//14808004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22297 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=7505
R=amouravski@google.com

Review URL: https://codereview.chromium.org//14586004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22295 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=10348
R=amouravski@google.com

Review URL: https://codereview.chromium.org//14682017

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22289 260f80e4-7a28-3924-810f-c04153c831b5

BUG=

Review URL: https://codereview.chromium.org//14701007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22251 260f80e4-7a28-3924-810f-c04153c831b5

R=ajohnsen@google.com
BUG=

Review URL: https://codereview.chromium.org//14645013

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22234 260f80e4-7a28-3924-810f-c04153c831b5

This is failing on normal windows, but passing on russian locale.

Upped issue 10348 to high priority

R=kustermann@google.com

Review URL: https://codereview.chromium.org//14757002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22224 260f80e4-7a28-3924-810f-c04153c831b5

Filed issue 10348

R=ajohnsen@google.com

Review URL: https://codereview.chromium.org//14752003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@22222 260f80e4-7a28-3924-810f-c04153c831b5