Use HTTPS links for Google domains in docs

docs/mac_build_instructions.md

 # Checking out and building Chromium for Mac
 
 There are instructions for other platforms linked from the 
 [get the code](get_the_code.md) page.
 
 ## Instructions for Google Employees
 
 Are you a Google employee? See
 [go/building-chrome](https://goto.google.com/building-chrome) instead.
 
@@ skipping 152 matching lines @@
 ```
 $ out/Default/unit_tests --gtest_filter="PushClientTest.*"
 ```
 
 You can find out more about GoogleTest at its
 [GitHub page](https://github.com/google/googletest).
 
 ## Debugging
 
 Good debugging tips can be found
-[here](http://dev.chromium.org/developers/how-tos/debugging-on-os-x). If you
+[here](https://dev.chromium.org/developers/how-tos/debugging-on-os-x). If you
 would like to debug in a graphical environment, rather than using `lldb` at the
 command line, that is possible without building in Xcode (see
-[Debugging in Xcode](http://www.chromium.org/developers/how-tos/debugging-on-os-x/building-with-ninja-debugging-with-xcode)).
+[Debugging in Xcode](https://www.chromium.org/developers/how-tos/debugging-on-os-x/building-with-ninja-debugging-with-xcode)).
 
 ## Update your checkout
 
 To update an existing checkout, you can run
 
 ```shell
 $ git rebase-update
 $ gclient sync
 ```
 
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 You may run into a problem where http://YES is opened as a new tab every time
 you launch Chrome. To fix this, open the scheme editor for the Run scheme,
 choose the Options tab, and uncheck "Allow debugging when using document
 Versions Browser". When this option is checked, Xcode adds
 `--NSDocumentRevisionsDebugMode YES` to the launch arguments, and the `YES`
 gets interpreted as a URL to open.
 
 If you have problems building, join us in `#chromium` on `irc.freenode.net` and
 ask there. Be sure that the
-[waterfall](http://build.chromium.org/buildbot/waterfall/) is green and the
+[waterfall](https://build.chromium.org/buildbot/waterfall/) is green and the
 tree is open before checking out. This will increase your chances of success.
 
 ### Improving performance of `git status`
 
 `git status` is used frequently to determine the status of your checkout.  Due
 to the large number of files in Chromium's checkout, `git status` performance
 can be quite variable.  Increasing the system's vnode cache appears to help. By
 default, this command:
 
 ```shell
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 ```shell
 $ xcodebuild -license
 ```
 
 Only accepting for all users of the machine requires root:
 
 ```shell
 $ sudo xcodebuild -license
 ```