Add gitignore, status, and codereview files.

pkgs/source_maps/.gitignore

diff --git a/pkgs/source_maps/.gitignore b/pkgs/source_maps/.gitignore
new file mode 100644
index 0000000..388eff0
--- /dev/null
+++ b/pkgs/source_maps/.gitignore
@@ -0,0 +1,14 @@
+# Don’t commit the following directories created by pub.
+.buildlog
+.pub/
+build/
+packages
+
+# Or the files created by dart2js.
+*.dart.js
+*.js_
+*.js.deps
+*.js.map
+
+# Include when developing application packages.
+pubspec.lock
\ No newline at end of file

pkgs/source_maps/.status

diff --git a/pkgs/source_maps/.status b/pkgs/source_maps/.status
new file mode 100644
index 0000000..befa7dd
--- /dev/null
+++ b/pkgs/source_maps/.status
@@ -0,0 +1,20 @@
+# Copyright (c) 2014, 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/*: Skip
+*/packages/*: Skip
+*/*/packages/*: Skip
+*/*/*/packages/*: Skip
+*/*/*/*packages/*: Skip
+*/*/*/*/*packages/*: Skip
+
+# Only run tests from the build directory, since we don't care about the
+# difference between transformed an untransformed code.
+test/*: Skip
+
+[ $compiler == dart2js || $compiler == dart2dart ]
+build/test/vlq_test: RuntimeError # A VLQ test checks for large numbers that
+                                  # overflow in JS (numbers slightly larger than
+                                  # 32 bits where we do bitwise operations).

pkgs/source_maps/codereview.settings

diff --git a/pkgs/source_maps/codereview.settings b/pkgs/source_maps/codereview.settings
new file mode 100644
index 0000000..313ad0a
--- /dev/null
+++ b/pkgs/source_maps/codereview.settings
@@ -0,0 +1,3 @@
+CODE_REVIEW_SERVER: http://codereview.chromium.org/
+VIEW_VC: https://github.com/dart-lang/source_maps/commit/
+CC_LIST: reviews@dartlang.org
\ No newline at end of file