Roll Observatory packages and add a roll script

packages/stack_trace/CHANGELOG.md

+## 1.4.2
+
+* Improve the display of `data:` URIs in stack traces.
+
+## 1.4.1
+
+* Fix a crashing bug in `UnparsedFrame.toString()`.
+
+## 1.4.0
+
+* `new Trace.parse()` and related constructors will no longer throw an exception
+  if they encounter an unparseable stack frame. Instead, they will generate an
+  `UnparsedFrame`, which exposes no metadata but preserves the frame's original
+  text.
+
+* Properly parse native-code V8 frames.
+
+## 1.3.5
+
+* Properly shorten library names for pathnames of folded frames on Windows.
+
+## 1.3.4
+
+* No longer say that stack chains aren't supported on dart2js now that
+  [sdk#15171][] is fixed. Note that this fix only applies to Dart 1.12.
+
+[sdk#15171]: https://github.com/dart-lang/sdk/issues/15171
+
+## 1.3.3
+
+* When a `null` stack trace is passed to a completer or stream controller in
+  nested `Chain.capture()` blocks, substitute the inner block's chain rather
+  than the outer block's.
+
+* Add support for empty chains and chains of empty traces to `Chain.parse()`.
+
+* Don't crash when parsing stack traces from Dart VM stack overflows.
+
+## 1.3.2
+
+* Don't crash when running `Trace.terse` on empty stack traces.
+
+## 1.3.1
+
+* Support more types of JavaScriptCore stack frames.
+
+## 1.3.0
+
+* Support stack traces generated by JavaScriptCore. They can be explicitly
+  parsed via `new Trace.parseJSCore` and `new Frame.parseJSCore`.
+
+## 1.2.4
+
+* Fix a type annotation in `LazyTrace`.
+
+## 1.2.3
+
+* Fix a crash in `Chain.parse`.
+
+## 1.2.2
+
+* Don't print the first folded frame of terse stack traces. This frame
+  is always just an internal isolate message handler anyway. This
+  improves the readability of stack traces, especially in stack chains.
+
+* Remove the line numbers and specific files in all terse folded frames, not
+  just those from core libraries.
+
+* Make padding consistent across all stack traces for `Chain.toString()`.
+
+## 1.2.1
+
+* Add `terse` to `LazyTrace.foldFrames()`.
+
+* Further improve stack chains when using the VM's async/await implementation.
+
+## 1.2.0
+
+* Add a `terse` argument to `Trace.foldFrames()` and `Chain.foldFrames()`. This
+  allows them to inherit the behavior of `Trace.terse` and `Chain.terse` without
+  having to duplicate the logic.
+
+## 1.1.3
+
+* Produce nicer-looking stack chains when using the VM's async/await
+  implementation.
+
+## 1.1.2
+
+* Support VM frames without line *or* column numbers, which async/await programs
+  occasionally generate.
+
+* Replace `<<anonymous closure>_async_body>` in VM frames' members with the
+  terser `<async>`.
+
+## 1.1.1
+
+* Widen the SDK constraint to include 1.7.0-dev.4.0.
+
+## 1.1.0
+
+* Unify the parsing of Safari and Firefox stack traces. This fixes an error in
+  Firefox trace parsing.
+
+* Deprecate `Trace.parseSafari6_0`, `Trace.parseSafari6_1`,
+  `Frame.parseSafari6_0`, and `Frame.parseSafari6_1`.
+
+* Add `Frame.parseSafari`.
+
+## 1.0.3
+
+* Use `Zone.errorCallback` to attach stack chains to all errors without the need
+  for `Chain.track`, which is now deprecated.
+
+## 1.0.2
+
+* Remove a workaround for [issue 17083][].
+
+[issue 17083]: http://code.google.com/p/dart/issues/detail?id=17083
+
+## 1.0.1
+
+* Synchronous errors in the [Chain.capture] callback are now handled correctly.
+
+## 1.0.0
+
+* No API changes, just declared stable.
+
+## 0.9.3+2
+
+* Update the dependency on path.
+
+* Improve the formatting of library URIs in stack traces.
+
+## 0.9.3+1
+
+* If an error is thrown in `Chain.capture`'s `onError` handler, that error is
+  handled by the parent zone. This matches the behavior of `runZoned` in
+  `dart:async`.
+
+## 0.9.3
+
+* Add a `Chain.foldFrames` method that parallels `Trace.foldFrames`.
+
+* Record anonymous method frames in IE10 as "<fn>".