Currently Flutter is the only supported SDK.

Closes #1431

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2174913002 .

This allows PackageName equality to include description equality, and it
substantially cleans up other logic dealing with sources.

See #912

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2079303003 .

This splits Source into two classes, Source and LiveSource. The former
is completely independent of the system cache directory, and mostly
contains source metadata and logic about manipulating descriptions.

SourceRegistry now deals strictly in Sources, with LiveSources being
handled by SystemCache. This means that classes like Pubspec and
LockFile no longer have transitive references to the system cache
directory.

This will also make it possible to clean up PackageName equality logic
by making PackageNames track their concrete Sources rather than just
their source names.

See #912

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2044253003 .

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1585513002 .

This considers the lockfile stale if the intersection of all selected
packages' SDK constraints don't match the current SDK, or if it contains
a path dependency whose own dependencies don't match the lockfile.

Closes #1091
Closes #1101

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1534093002 .

R=rnystrom@google.com
BUG=20482

Review URL: https://codereview.chromium.org//491993002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39441 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=10582
R=nweiz@google.com

Review URL: https://codereview.chromium.org//344493003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37464 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//243683002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@35344 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=5391
RELNOTE=Add "pub cache repair" command to re-install cached packages.
R=nweiz@google.com

Review URL: https://codereview.chromium.org//228703006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@35111 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//103453005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@31120 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=7351
R=nweiz@google.com

Review URL: https://codereview.chromium.org//26284002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@28330 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//18143002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@24555 260f80e4-7a28-3924-810f-c04153c831b5

This also makes it a little more intelligent about which errors it prints what
information for.

BUG=9921

Review URL: https://codereview.chromium.org//14253005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@21698 260f80e4-7a28-3924-810f-c04153c831b5

Previously, it was a mix of both styles. Now it's consistent. :)

Review URL: https://codereview.chromium.org//11638010

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@16354 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://codereview.chromium.org//11093012

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@13391 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://chromiumcodereview.appspot.com//10869033

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@11270 260f80e4-7a28-3924-810f-c04153c831b5

Spec has been changed back.
VM temporarily accepts a single type argument and emits a warning.
Update tests, dart2js source, dartdoc, etc...
Disable failing co19 tests (issue 175 filed).
Review URL: https://chromiumcodereview.appspot.com//10854191

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@10861 260f80e4-7a28-3924-810f-c04153c831b5

Lock files can be parsed (from strings) with tests.

Review URL: https://chromiumcodereview.appspot.com//10542015

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@8362 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://chromiumcodereview.appspot.com//10442023

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@7967 260f80e4-7a28-3924-810f-c04153c831b5

This was submitted as r7623, but was then reverted due to test failures. The new
version doesn't depend on Git's output.

Review URL: https://chromiumcodereview.appspot.com//10392089

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@7629 260f80e4-7a28-3924-810f-c04153c831b5

TBR

Review URL: https://chromiumcodereview.appspot.com//10388123

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@7626 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://chromiumcodereview.appspot.com//10386021

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@7623 260f80e4-7a28-3924-810f-c04153c831b5