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

.gitignore

Index: .gitignore
diff --git a/.gitignore b/.gitignore
index 9d30a0f1623560c04ab4acddbbcaf45fd9699eba..75685d9d6ab856f93214a7f5326251c41a4e28d3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,17 +42,41 @@ v8.log
 /third_party/dart-sdk/
 /third_party/dart-pkg/archive

[tonyg, 2015/09/16 14:00:37]

This list seems hard to maintain.

It looks like the only thing we don't ignore in the dart-pkg dir is BUILD.gn. If
so, we could move that file to //build/secondary/third_party/dart-pkg/BUILD.gn.
The build system finds it there automatically and then we can just ignore this
entire dir.

[Cutch, 2015/09/16 14:18:34]

Done.

 /third_party/dart-pkg/args
+/third_party/dart-pkg/async
+/third_party/dart-pkg/barback
 /third_party/dart-pkg/box2d
 /third_party/dart-pkg/cassowary
 /third_party/dart-pkg/collection
+/third_party/dart-pkg/charcode
 /third_party/dart-pkg/crypto
+/third_party/dart-pkg/csslib
+/third_party/dart-pkg/glob
+/third_party/dart-pkg/html
+/third_party/dart-pkg/http_multi_server
+/third_party/dart-pkg/http_parser
+/third_party/dart-pkg/logging
+/third_party/dart-pkg/matcher
+/third_party/dart-pkg/mime
 /third_party/dart-pkg/newton
+/third_party/dart-pkg/package_config
 /third_party/dart-pkg/path
+/third_party/dart-pkg/plugin
+/third_party/dart-pkg/pool
+/third_party/dart-pkg/pub_semver/
 /third_party/dart-pkg/quiver
+/third_party/dart-pkg/shelf
+/third_party/dart-pkg/shelf_static
+/third_party/dart-pkg/shelf_web_socket
+/third_party/dart-pkg/source_map_stack_trace
+/third_party/dart-pkg/source_maps
 /third_party/dart-pkg/source_span
 /third_party/dart-pkg/string_scanner
+/third_party/dart-pkg/stack_trace
+/third_party/dart-pkg/test
+/third_party/dart-pkg/unittest
+/third_party/dart-pkg/utf
 /third_party/dart-pkg/vector_math
-/third_party/dart-pkg/vector_math
+/third_party/dart-pkg/watcher
 /third_party/dart-pkg/yaml
 /third_party/dejavu-fonts-ttf-2.34/ttf/*.ttf
 /third_party/freetype-android/src