Fix various issues with Markdown docs

docs/linux_build_instructions.md

 # Linux-specific build instructions
 
 [TOC]
 
 ## Get the code
 
 [Get the Code](http://dev.chromium.org/developers/how-tos/get-the-code). The
 general instructions on the "Get the code" page cover basic Linux build setup
 and configuration.
 
 This page documents some additional Linux-specific build issues.
 
 ## Overview
 
 Due its complexity, Chromium uses a set of custom tools to check out and build.
 Here's an overview of the steps you'll run:
 
 1.  **gclient**. A checkout involves pulling nearly 100 different SVN
     repositories of code. This process is managed with a tool called `gclient`.
 1.  **GN** / **gyp**. Cross-platform build configuration systems (GYP is the
     older one, GN is the one being transitioned to). It generates ninja build
     files. Running `gn`/`gyp` is analogous to the `./configure` step seen in
     most other software.
 1.  **ninja**. The actual build itself uses `ninja`. A prebuilt binary is in
     `depot_tools` and should already be in your path if you followed the steps
     to check out Chromium.
 1.  We don't provide any sort of "install" step.
 1.  You may want to
-    [use a chroot](http://code.google.com/p/chromium/wiki/UsingALinuxChroot) to
+    [use a chroot](using_a_linux_chroot.md) to
     isolate yourself from versioning or packaging conflicts (or to run the
     layout tests).
 
 ## Getting a checkout
 
 [Prerequisites](linux_build_instructions_prerequisites.md): what you need before
 you build.
 
 **Note**. If you are working on Chromium OS and already have sources in
 `chromiumos/chromium`, you **must** run `chrome_set_ver --runhooks` to set the
@@ skipping 97 matching lines @@
 *   Want to use Eclipse as your IDE? See
     [LinuxEclipseDev](linux_eclipse_dev.md).
 *   Built version as Default Browser? See
     [LinuxDevBuildAsDefaultBrowser](linux_dev_build_as_default_browser.md).
 
 ## Next Steps
 
 If you want to contribute to the effort toward a Chromium-based browser for
 Linux, please check out the [Linux Development page](linux_development.md) for
 more information.