doc: update working-with-native-branches information

cherry-picked from
  https://github.com/webrtc/webrtc-org/pull/242

BUG=webrtc:11266

No-try: true
Change-Id: I0fd725d3bd30805416fd8a54f3d7a772772715f0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/197811
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philipp Hancke <philipp.hancke@googlemail.com>
Cr-Commit-Position: refs/heads/master@{#32842}
diff --git a/docs/native-code/development/index.md b/docs/native-code/development/index.md
index 04393a9..3c7a534 100644
--- a/docs/native-code/development/index.md
+++ b/docs/native-code/development/index.md
@@ -134,10 +134,10 @@
 ```
 
 To create a local branch tracking a remote release branch (in this example,
-the 43 branch):
+the branch corresponding to Chrome M80):
 
 ```
-$ git checkout -b my_branch refs/remotes/branch-heads/43
+$ git checkout -b my_branch refs/remotes/branch-heads/3987
 $ gclient sync
 ```
 
@@ -159,11 +159,13 @@
 
 The above is untested and unsupported, but it might help.
 
-Commit log for the branch: [https://webrtc.googlesource.com/src/+log/branch-heads/43][m43-log]
-To browse it: [https://webrtc.googlesource.com/src/+/branch-heads/43][m43]
+Commit log for the branch: [https://webrtc.googlesource.com/src/+log/branch-heads/3987][m80-log]
+To browse it: [https://webrtc.googlesource.com/src/+/branch-heads/3987][m80]
 
 For more details, read Chromium's [Working with Branches][chromium-work-branches] and
 [Working with Release Branches][chromium-work-release-branches] pages.
+To find the branch corresponding to a Chrome release check the
+[Chromium Dashboard][https://chromiumdash.appspot.com/branches].
 
 
 ## Contributing Patches
@@ -264,5 +266,5 @@
 [depot-tools]: http://commondatastorage.googleapis.com/chrome-infra-docs/flat/depot_tools/docs/html/depot_tools_tutorial.html#_setting_up
 [rfc-5389]: https://tools.ietf.org/html/rfc5389
 [rfc-5766]: https://tools.ietf.org/html/rfc5766
-[m43-log]: https://webrtc.googlesource.com/src/+log/branch-heads/43
-[m43]: https://webrtc.googlesource.com/src/+/branch-heads/43
+[m80-log]: https://webrtc.googlesource.com/src/+log/branch-heads/3987
+[m80]: https://webrtc.googlesource.com/src/+/branch-heads/3987