Change imports to clean up irritating warning

Change imports to clean up irritating warning

This gets rid of the following messages in the build:

patched_dart2js_sdk/lib/_internal/js_runtime/lib/native_typed_data.dart: Nit: 'Symbol' is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/svg/dart2js/svg_dart2js.dart: Nit: 'Symbol' is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_audio/dart2js/web_audio_dart2js.dart: Nit: 'Symbol' is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_gl/dart2js/web_gl_dart2js.dart: Nit: 'Symbol' is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_sql/dart2js/web_sql_dart2js.dart: Nit: 'Symbol' is imported from both 'dart:_internal' and 'dart:core'.


BUG=
R=ahe@google.com, sigmund@google.com

Committed: https://github.com/dart-lang/sdk/commit/8623950864c14de7d02b8b527c4d07804cc5c5c0

[sra1, 2017-07-11 22:38:54]

sra@google.com changed reviewers:
+ ahe@google.com

[Siggi Cherem (dart-lang), 2017-07-11 23:41:13]

sigmund@google.com changed reviewers:
+ sigmund@google.com

[Siggi Cherem (dart-lang), 2017-07-11 23:41:13]

lgtm

[Siggi Cherem (dart-lang), 2017-07-11 23:42:04]

Note that Peter has a CL that will hide the nits in the build.py, but it's good
to fix these regardless.

[ahe, 2017-07-12 09:54:53]

lgtm

Thank you!

As Siggi mentioned, we will turn these nits off again. However, I wonder if it
would make sense to turn on nits for our platform libraries?

Moving forward, we will produce a non-zero exit code if we report any problems
(errors, warnings, nits, etc.). So we shouldn't get into this situation again.

[sra1, 2017-07-12 21:38:04]

Description was changed from

==========
Change imports to clean up irritating warning

This gets rid of the following messages in the build:

patched_dart2js_sdk/lib/_internal/js_runtime/lib/native_typed_data.dart: Nit:
'Symbol' is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/svg/dart2js/svg_dart2js.dart: Nit: 'Symbol' is imported
from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_audio/dart2js/web_audio_dart2js.dart: Nit: 'Symbol'
is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_gl/dart2js/web_gl_dart2js.dart: Nit: 'Symbol' is
imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_sql/dart2js/web_sql_dart2js.dart: Nit: 'Symbol' is
imported from both 'dart:_internal' and 'dart:core'.


BUG=
==========

to

==========
Change imports to clean up irritating warning

This gets rid of the following messages in the build:

patched_dart2js_sdk/lib/_internal/js_runtime/lib/native_typed_data.dart: Nit:
'Symbol' is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/svg/dart2js/svg_dart2js.dart: Nit: 'Symbol' is imported
from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_audio/dart2js/web_audio_dart2js.dart: Nit: 'Symbol'
is imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_gl/dart2js/web_gl_dart2js.dart: Nit: 'Symbol' is
imported from both 'dart:_internal' and 'dart:core'.
patched_dart2js_sdk/lib/web_sql/dart2js/web_sql_dart2js.dart: Nit: 'Symbol' is
imported from both 'dart:_internal' and 'dart:core'.


BUG=
R=ahe@google.com, sigmund@google.com

Committed:
https://github.com/dart-lang/sdk/commit/8623950864c14de7d02b8b527c4d07804cc5c5c0
==========

[sra1, 2017-07-12 21:38:05]

Committed patchset #1 (id:1) manually as
8623950864c14de7d02b8b527c4d07804cc5c5c0 (presubmit successful).