[MediaGalleries] Update overall package doc to include iphoto paragraph.

chrome/common/extensions/docs/templates/intros/mediaGalleries.html

 <h2 id="usage">Usage</h2>
 
 <p>The mediaGalleries API lets you prompt the user for permission to access
 media galleries on the user's computer. The permission dialog contains common
 media locations for the platform and allows the user to specify additional
 locations. From those locations, only media files will be present in the file
 system objects.</p>
 
 <h2 id="manifest">Manifest</h2>
 
@@ skipping 92 matching lines @@
 <p>This example manifest file will trigger an install-time permission prompt,
 and let the app read from all auto-detected media galleries on the
 user's computer. The user may add or remove galleries using the
 media gallery permission dialog, after which the app will be able
 to read all the media files from galleries that the user selected.</p>
 
 <h2 id="iTunes">iTunes</h2>
 
 <p>If present, the user's iTunes library can be accessed as a media gallery.
 In addition to the media files in the library, the "iTunes Music Library.xml"
-file is also presented. Regardless of where the music files are actually on the
-disk (and where the xml file says they are), they are mapping into an
-Artist/Album/Track hierarchy like iTunes does by default.  This mapping doesn't
-always work perfectly, so there are two things to note for Apps trying to match
-the xml file with files in the gallery. If the filenames for tracks within an
-album are not unique, they will be uniquified by adding the track id in
-parentheses before the extension, and if there is a colon or a slash in the
-artist, album, or track name, they are turned into underscore characters.</p>
+file is also presented.</p>
+<p>Regardless of where the music files are actually on the disk (and where
+the xml file says they are), they are mapped into an Artist/Album/Track
+hierarchy like iTunes does by default.  This mapping doesn't always work
+perfectly, so there are two things to note for Apps trying to match the
+xml file with files in the gallery.</p>
+<p>If the filenames for tracks within an album are not unique, they will be
+uniquified by adding the track id in parentheses before the extension, and
+if there is a colon or a slash in the artist, album, or track name, they are
+turned into underscore characters.</p>
 
 <h2 id="Picasa">Picasa</h2>
 
 <p>If present, the user's Picasa library can also be accessed as a media
 gallery. Directories on the filesystem scanned by Picasa are presented under
-folders/. Picasa Albums are presented under albums/. Albums and Folders that
-have duplicate names and dates will be uniquified using an incrementing
-integer in parenthesis before the extension. Duplicate filenames within the
-same Album will also be uniquified using an incrementing integer in parenthesis
-before the extension.</p>
+folders/. Picasa Albums are presented under albums/.</p>
+<p>Albums and Folders that have duplicate names and dates will be uniquified
+using an incrementing integer in parenthesis before the extension.</p>
+<p>Duplicate filenames within the same Album will also be uniquified using an
+incrementing integer in parenthesis before the extension.</p>
+
+<h2 id="iPhoto">iPhoto</h2>
+
+<p>If present, the user's iPhoto library can be accessed as a media gallery.
+The files are structured within a subdirectory called "Albums/". Within that
+subdirectory, each album in the user's iPhoto library will appear as a
+subdirectory by name, and contain file entries for the photos in that album.
+</p>
+<p>Duplicate album names or image filenames with albums will get a

[vandebo (ex-Chrome), 2014/03/28 20:52:46]

with -> within ?

+disambiguating suffix like "(NN)" where NN is a unique number.</p>
+<p>Any items appearing in multiple albums in iPhoto will appear in all those
+albums in the gallery.</p>
+<p>If the user has modified any images within an album, there will be an
+additional subdirectory called "originals/" within the album directory, which
+will then contain the original image, which will have the same filename as
+the file in the album itself. The file as it appears in the album directory,
+though, will be the one the user has invested time cropping, rotating, or
+otherwise editing.</p>
+