Remove references to Github in README and CONTRIBUTING

BUG=dawn:23

Change-Id: I538271d67581da4212e62662617890bd28f624df
Reviewed-on: https://dawn-review.googlesource.com/c/1780
Reviewed-by: David Neto <dneto@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b0e3b11..c500c15 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -18,7 +18,4 @@
 ## Code reviews
 
 All submissions, including submissions by project members, require review. We
-use GitHub pull requests for this purpose. Consult
-[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
-information on using pull requests.
-
+use [Dawn's Gerrit](https://dawn-review.googlesource.com) for this purpose.
diff --git a/README.md b/README.md
index 3d6804f..fb465d67 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@
 
 ```sh
 # Clone the repo as "dawn"
-git clone https://github.com/google/nxt-standalone.git dawn && cd dawn
+git clone https://dawn.googlesource.com/dawn dawn && cd dawn
 
 # Bootstrap the gclient configuration
 cp scripts/standalone.gclient .gclient
@@ -60,6 +60,8 @@
 Dawn doesn't have a formal coding style yet, except what's defined by our clang format style.
 Overall try to use the same style and convention as code around your change.
 
+If you find issues with Dawn, please feel free to report them on the [bug tracker](https://bugs.chromium.org/p/dawn/issues/entry).
+
 ## License
 
 Please see [LICENSE](/LICENSE).