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

mojo/public/dart/third_party/source_map_stack_trace/.status

Index: mojo/public/dart/third_party/source_map_stack_trace/.status
diff --git a/mojo/public/dart/third_party/source_map_stack_trace/.status b/mojo/public/dart/third_party/source_map_stack_trace/.status
new file mode 100644
index 0000000000000000000000000000000000000000..0788ce1b83ff8ea99347a9f7ca2d677f8118e17d
--- /dev/null
+++ b/mojo/public/dart/third_party/source_map_stack_trace/.status
@@ -0,0 +1,24 @@
+# Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# Skip non-test files ending with "_test".
+packages/*: SkipByDesign
+*/packages/*: SkipByDesign
+*/*/packages/*: SkipByDesign
+*/*/*/packages/*: SkipByDesign
+*/*/*/*packages/*: SkipByDesign
+*/*/*/*/*packages/*: SkipByDesign
+
+# Only run tests from the test directory, since we don't care about the
+# difference between transformed an untransformed code.
+build/test/*: SkipByDesign
+build/test/*/*: SkipByDesign
+build/test/*/*/*: SkipByDesign
+build/test/*/*/*/*: SkipByDesign
+
+# Don't run library files as tests
+lib/*: SkipByDesign
+lib/*/*: SkipByDesign
+lib/*/*/*: SkipByDesign
+lib/*/*/*/*: SkipByDesign