Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/analyzer/README.md

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+The analysis package defines support for performing static analysis of Dart
+code. It was designed to support tooling efforts, but has also been used for
+such things as statistics gathering and code transformers.
+
+If you are interested in providing Dart support in a long-running tool, such as
+an editor or IDE, you should use the analysis server instead of this package.
+The analysis server is currently shipped as an executable in the SDK and will
+be released as a package in the near future. In the meantime, if you'd like to
+learn more about it, please look at the
+[Analysis Server API Specification](http://htmlpreview.github.io/?https://github.com/dart-lang/sdk/blob/master/pkg/analysis_server/doc/api.html)
+or contact the mailing list (see below).
+
+The API's in this package are, quite frankly, a mess at the moment. They were
+originally machine generated by a translator and were based on an earlier Java
+implementation. Several of the API's still look like their Java predecessors
+(or worse) rather than clean Dart API's.
+
+In addition, there is currently no clean distinction between public and internal
+API's. We plan to address this issue soon, but doing so will, unfortunately,
+require a large number of breaking changes. We will try to minimize the pain
+this causes for our clients, but some pain is inevitable.
+
+Questions and requests for additional functionality are welcome, and can be made
+by either opening an issue at
+[http://dartbug.com](http://dartbug.com)
+or by emailing
+[analyzer-discuss@dartlang.org](https://groups.google.com/a/dartlang.org/forum/#!forum/analyzer-discuss).