Use deferred loading for message catalogs.

Use deferred loading for message catalogs.

BUG=
R=efortuna@google.com

Committed: https://code.google.com/p/dart/source/detail?r=36235

[Alan Knight, 2014-05-15 19:18:17]

Also contains code to add a --local option to the message_extraction_test, so
you can generate the files locally instead of in a generated temp directory and
debug it.

And there was a race condition in the test that printing English had a single
message that was always printed in the French locale. Now that initializing the
French locale actually takes non-zero time, that failed, so printing English
still has to wait on the Future for French.

[Emily Fortuna, 2014-05-15 19:24:36]

lgtm, minor nits

https://codereview.chromium.org/290073002/diff/1/pkg/intl/lib/generate_locali...
File pkg/intl/lib/generate_localized.dart (right):

https://codereview.chromium.org/290073002/diff/1/pkg/intl/lib/generate_locali...
pkg/intl/lib/generate_localized.dart:187: output.write("  '$locale' : () =>
${_libraryName(locale)}.loadLibrary(),\n");
80 char

https://codereview.chromium.org/290073002/diff/1/pkg/intl/test/message_extrac...
File pkg/intl/test/message_extraction/message_extraction_test.dart (right):

https://codereview.chromium.org/290073002/diff/1/pkg/intl/test/message_extrac...
pkg/intl/test/message_extraction/message_extraction_test.dart:19: String get
tempDir => _tempDir == null ? _tempDir = _createTempDir() : _tempDir;
can you put a brief comment above this section here similar to the lines 49-51
explaining what these functions are?

[Alan Knight, 2014-05-15 20:02:10]

Committed patchset #3 manually as r36235 (presubmit successful).

[Alan Knight, 2014-05-15 20:02:18]

https://codereview.chromium.org/290073002/diff/1/pkg/intl/lib/generate_locali...
File pkg/intl/lib/generate_localized.dart (right):

https://codereview.chromium.org/290073002/diff/1/pkg/intl/lib/generate_locali...
pkg/intl/lib/generate_localized.dart:187: output.write("  '$locale' : () =>
${_libraryName(locale)}.loadLibrary(),\n");
On 2014/05/15 19:24:36, Emily Fortuna wrote:
> 80 char

Done.

https://codereview.chromium.org/290073002/diff/1/pkg/intl/test/message_extrac...
File pkg/intl/test/message_extraction/message_extraction_test.dart (right):

https://codereview.chromium.org/290073002/diff/1/pkg/intl/test/message_extrac...
pkg/intl/test/message_extraction/message_extraction_test.dart:19: String get
tempDir => _tempDir == null ? _tempDir = _createTempDir() : _tempDir;
On 2014/05/15 19:24:36, Emily Fortuna wrote:
> can you put a brief comment above this section here similar to the lines 49-51
> explaining what these functions are?

Done.