[HBD] Update MD Site Settings Plugins section to show 3rd mode checkbox.

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- About Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_ABOUT_PAGE_DETAILED_BUILD_INFO" desc="Label describing the section that shows detailed information about the current Chrome build.">
       Detailed build information
     </message>
     <message name="IDS_SETTINGS_ABOUT_PAGE_ARC_VERSION" desc="Label for ARC version">
       ARC Version
@@ skipping 1239 matching lines @@
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_SHOW_ALL_RECOMMENDED" desc="Label for the global 'Show all' toggle (category default) in site settings -- a recommended setting for some categories, such as when sites want to show images.">
     Show all (recommended)
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_COOKIES_ALLOW_SITES" desc="The 'allow cookies' label in site settings.">
     Allow sites to save and read cookie data
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_COOKIES_ALLOW_SITES_RECOMMENDED" desc="The 'allow cookies' label in site settings -- the recommended setting for when sites want to read/write cookie information.">
     Allow sites to save and read cookie data (recommended)
   </message>
-  <message name="IDS_SETTINGS_SITE_SETTINGS_PLUGINS_DETECT_IMPORTANT" desc="The 'detect and run important content' label in site settings.">
-    Detect and run important plugin content
+  <message name="IDS_SETTINGS_SITE_SETTINGS_FLASH_ALLOW" desc="The 'allow' label for Flash in site settings.">
+    Allow sites to run Flash
   </message>
-  <message name="IDS_SETTINGS_SITE_SETTINGS_PLUGINS_DETECT_IMPORTANT_RECOMMENDED" desc="The 'detect and run important content' label in site settings -- the recommended setting for when sites want to run plugins.">
-    Detect and run important plugin content (recommended)
+  <message name="IDS_SETTINGS_SITE_SETTINGS_FLASH_BLOCK" desc="The 'block' label for Flash in site settings.">
+    Block sites from running Flash
   </message>
-  <message name="IDS_SETTINGS_SITE_SETTINGS_PLUGINS_CHOOSE" desc="The 'let me choose' label in site settings.">
-    Let me choose when to run plugin content
+  <message name="IDS_SETTINGS_SITE_SETTINGS_FLASH_DETECT_IMPORTANT" desc="The 'detect and run important content' label in site settings.">
+    Run only important content
+  </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_FLASH_DETECT_IMPORTANT_SUBTITLE" desc="The 'detect and run important content' subtitle label in site settings.">
+    Detect and run only important Flash content (recommended)
+  </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_FLASH_ASK_BEFORE_RUNNING" desc="The 'ask before running' label for Flash in site settings.">
+    Ask first
+  </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_FLASH_ASK_BEFORE_RUNNING_SUBTITLE" desc="The 'ask before running' subtitle label for Flash in site settings.">
+    Ask before allowing sites to run Flash (recommended)
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_BACKGROUND_SYNC_ALLOW_RECENTLY_CLOSED_SITES" desc="The allow label for background sync in site settings.">
     Allow recently closed sites to finish sending and receiving data
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_BACKGROUND_SYNC_ALLOW_RECENTLY_CLOSED_SITES_RECOMMENDED" desc="The allow label for background sync in site settings (with the 'recommended' suffix).">
     Allow recently closed sites to finish sending and receiving data (recommended)
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_BACKGROUND_SYNC_BLOCKED" desc="The block label for background sync in site settings.">
     Do not allow recently closed sites to finish sending and receiving data
   </message>
@@ skipping 637 matching lines @@
       System
     </message>
     <message name="IDS_SETTINGS_SYSTEM_HARDWARE_ACCELERATION_LABEL" desc="Label for the checkbox that forces Chrome to render via hardware acceleration (GPU) when available.">
       Use hardware acceleration when available
     </message>
     <message name="IDS_SETTINGS_SYSTEM_PROXY_SETTINGS_BUTTON" desc="Text for the button that changes a user's network proxy settings.">
       Change proxy settings
     </message>
   </if>
 </grit-part>