Bug 852247 - adding new checkbox to expose pref to force page zoomability in settings. r=margaret

mobile/android/base/locales/en-US/android_strings.dtd

@@ -213,6 +213,8 @@ size. -->
 
 <!ENTITY pref_media_autoplay_enabled "Allow autoplay">
 <!ENTITY pref_media_autoplay_enabled_summary "Control if websites can autoplay videos and other media content">
+<!ENTITY pref_zoom_force_enabled "Always enable zoom">
+<!ENTITY pref_zoom_force_enabled_summary "Force override so you can zoom any page">
 
 <!ENTITY pref_use_master_password "Use master password">
 <!ENTITY pref_sync "Sync">

mobile/android/base/resources/xml/preferences_display.xml

@@ -29,6 +29,10 @@
                         android:title="@string/pref_media_autoplay_enabled"
                         android:summary="@string/pref_media_autoplay_enabled_summary" />
 
+    <CheckBoxPreference android:key="browser.ui.zoom.force-user-scalable"
+                        android:title="@string/pref_zoom_force_enabled"
+                        android:summary="@string/pref_zoom_force_enabled_summary" />
+
     <PreferenceCategory android:title="@string/pref_category_advanced">
 
         <CheckBoxPreference

mobile/android/base/strings.xml.in

@@ -206,6 +206,8 @@
   <string name="pref_font_size_preview_text">&pref_font_size_preview_text;</string>
   <string name="pref_media_autoplay_enabled">&pref_media_autoplay_enabled;</string>
   <string name="pref_media_autoplay_enabled_summary">&pref_media_autoplay_enabled_summary;</string>
+  <string name="pref_zoom_force_enabled">&pref_zoom_force_enabled;</string>
+  <string name="pref_zoom_force_enabled_summary">&pref_zoom_force_enabled_summary;</string>
   <string name="pref_reflow_on_zoom">&pref_reflow_on_zoom4;</string>
   <string name="pref_restore">&pref_restore;</string>
   <string name="pref_restore_always">&pref_restore_always;</string>