Introduce elipses when there are long stretches of blank lines in observatory.

Introduce elipses when there are long stretches of blank lines in observatory.

This is a reheat/rewrite of an old CL that got lost in the mill.

BUG=
R=johnmccutchan@google.com

Committed: https://code.google.com/p/dart/source/detail?r=42966

[turnidge, 2015-01-15 19:53:01]

turnidge@google.com changed reviewers:
+ johnmccutchan@google.com

[Cutch, 2015-01-15 21:58:16]

LGTM after fixing "int line = null" stuff.

https://codereview.chromium.org/849263002/diff/1/runtime/observatory/lib/src/...
File runtime/observatory/lib/src/elements/script_inset.dart (right):

https://codereview.chromium.org/849263002/diff/1/runtime/observatory/lib/src/...
runtime/observatory/lib/src/elements/script_inset.dart:14: int line = null;
remove this

https://codereview.chromium.org/849263002/diff/1/runtime/observatory/lib/src/...
File runtime/observatory/lib/src/elements/script_inset.html (right):

https://codereview.chromium.org/849263002/diff/1/runtime/observatory/lib/src/...
runtime/observatory/lib/src/elements/script_inset.html:52: <template if="{{
line.line != null }}">
how about: line is ScriptLine

[turnidge, 2015-01-16 18:13:45]

Committed patchset #2 (id:20001) manually as 42966 (presubmit successful).