General comment cleaning / refactoring for Mac Installer

chrome/installer/mac/app/README.md

 # Chrome Installer for Mac -- the repository!
 
 This Mac app installs Chrome on the machine it's run on. It's meant to be the
 Mac app the user first downloads when they click 'Download Chrome' on a Mac
 machine. After the user runs the app, Chrome would launch directly after
 installation completes successfully.
 
 ## The 10,000 Foot View
 
 The installer breaks down its task into the following steps:
 
   1.  __OmahaCommunication__: Ask Omaha for a URL of the most recent compatible
       copy of the Google Chrome disk image in Google's servers.
   2.  __Downloader__: Download the disk image, via URL from OmahaCommunication.
   3.  __Unpacker__: Mount the disk image and extract the Chrome app bundle.
   4.  __AuthorizedInstall__: With privilege escalation if able, move the Chrome
       app into the Applications folder, set permissions, and hand ownership of
       the Chrome app to `root`.
   5.  Launch Chrome & close.
 
 Each of the above modules are designed to carry one action before returning via
 delegate method. All of these main steps occur on a primary working thread
 (non-UI), with the exception of `AuthorizedInstall`, which makes use of an
-authorized-if-able subprocess.
+authorized-if-able subprocess. If the user does not provide permission to
+escalate privileges, `AuthorizedInstall` still does its job, but opts for the
+User's Applications folder instead of the system Applications folder.
 
 The OmahaXML* classes and SystemInfo class are simply classes to help
 OmahaCommunication do its work.
 
 The app's UI is made of a single window that has a determinate progress bar
 during download, which turns into an indeterminate one during installation. The
 options to set Chrome as a default browser and opt in for user metrics are made
 available to the user before they launch Chrome. Once Chrome is ready to launch,
 a Launch button will now be pressable -- this button will trigger Chrome to open
 and the installer app to close its remaining window. In the background, the app
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         |
         |
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   +-----+------+
   |            |
   | SystemInfo |
   |            |
   +------------+
 
 ```