[docs] update links to Contributing to Chromium

Change-Id: Ia8ddc3d94814a92804998ddef5615d07c2dd8840
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3021624
Reviewed-by: Sam Clegg <sbc@chromium.org>
Commit-Queue: Johann Koenig <johannkoenig@google.com>
Cr-Commit-Position: refs/heads/master@{#901253}

docs/cl_respect.md

@@ -52,7 +52,7 @@ looking at OWNERS files, asking a teammate, or using tools ('_git cl owners_',
 #### Provide context
 
 Change descriptions are the first impression your change makes, both on
-reviewers and on code archeologists from the future. A [good description](https://www.chromium.org/developers/contributing-code#TOC-Writing-change-list-descriptions)
+reviewers and on code archeologists from the future. A [good description](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/contributing.md#Uploading-a-change-for-review)
 aims to do two things. First, it conveys at a glance the high level view.
 Second, it provides references to all the relevant information for a deep dive:
 design docs, bugs, testing instructions. The bug\# is a useful reference, but

docs/vscode.md

@@ -44,7 +44,7 @@ Please keep this doc up-to-date. VS Code is still in active development and
 subject to changes. This doc is checked into the Chromium git repo, so if you
 make changes, read the [documentation
 guidelines](https://chromium.googlesource.com/chromium/src/+/main/docs/documentation_guidelines.md)
-and [submit a change list](https://www.chromium.org/developers/contributing-code).
+and [submit a change list](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/contributing.md).
 
 All file paths and commands have been tested on Linux. Windows and Mac might
 require a slightly different setup (e.g. `Ctrl` -> `Cmd`). Please update this

native_client_sdk/src/README

@@ -18,7 +18,7 @@ Contributing
 If you want to contribute to the Native Client SDK itself, please read the
 online documentation on contributing code to Chromium here:
 
-  http://www.chromium.org/developers/contributing-code
+  https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/contributing.md
 
 Known Issues
 ------------

third_party/inspector_protocol/crdtp/README.md

@@ -41,7 +41,7 @@ For output parameters:
 # Building and running the tests.
 
 If you're familiar with
-[Chromium's development process](https://www.chromium.org/developers/contributing-code)
+[Chromium's development process](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/contributing.md)
 and have the depot_tools installed, you may use these commands
 to fetch the package (and dependencies) and build and run the tests: