Add font family selector ui for distilled page viewer.

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit current_release="1" latest_public_release="0">
   <outputs>
     <output filename="values-am/android_chrome_strings.xml" lang="am" type="android" />
     <output filename="values-ar/android_chrome_strings.xml" lang="ar" type="android" />
     <output filename="values-bg/android_chrome_strings.xml" lang="bg" type="android" />
     <output filename="values-ca/android_chrome_strings.xml" lang="ca" type="android" />
     <output filename="values-cs/android_chrome_strings.xml" lang="cs" type="android" />
     <output filename="values-da/android_chrome_strings.xml" lang="da" type="android" />
     <output filename="values-de/android_chrome_strings.xml" lang="de" type="android" />
@@ skipping 345 matching lines @@
       </message>
       <message name="IDS_DARK_MODE" desc="Title of button that will change theme of distilled pages to dark mode.">
         Dark
       </message>
       <message name="IDS_LIGHT_MODE" desc="Title of button that will change theme of distilled pages to light mode.">
         Light
       </message>
       <message name="IDS_SEPIA_MODE" desc="Title of button that will change theme of distilled pages to sepia mode.">
         Sepia
       </message>
+      <message name="IDS_SANS_SERIF" desc="Title of the selector button that will change the typeface of distilled pages to use a SansSerif font.">
+        Sans Serif
+      </message>
+      <message name="IDS_SERIF" desc="Title of the selector button that will change the typeface of distilled pages to use a Serif font.">
+        Serif
+      </message>
+      <message name="IDS_MONOSPACE" desc="Title of the selector button that will change the typeface of distilled pages to use a Monospace font.">
+        Monospace
+      </message>
       <message name="IDS_TEXT_SIZE_SIGNIFIER" desc="A typical letter of the alphabet.  This is drawn on either end of a slider bar that allows the user to change the font size.  On one end, it is drawn smaller and on the other end larger.">
         A
       </message>
 
       <!-- TalkBack upgrade -->
       <message name="IDS_OLD_TALKBACK_TITLE" desc="Title of dialog notifying user that the version of TalkBack they're running is too old.">
         You need to update TalkBack to a newer version.
       </message>
       <message name="IDS_UPDATE_FROM_MARKET" desc="Title of button that will direct the user to update TalkBack from the market (Play Store)">
         Update
       </message>
       <message name="IDS_CANCEL_TALKBACK_ALERT" desc="Title of button that will cancel the TalkBack alert dialog dialog.">
         Cancel
       </message>
 
       <!-- Data Reduction Proxy -->
       <message name="IDS_DATA_REDUCTION_INFOBAR_TEXT" desc="Text to be displayed in the data reduction proxy infobar" translateable="false">
         You are part of a data reduction proxy field trial.
       </message>
       <message name="IDS_DATA_REDUCTION_INFOBAR_LINK_TEXT" desc="Text to be displayed in the data reduction proxy infobar link" translateable="false">
         Settings
       </message>
 
     </messages>
   </release>
 </grit>