Clarify wording around blocking 3rd party cookies and add lab to block reading of 3rd party cookies

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- This file contains definitions of resources that will be translated for
 each locale. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/generated_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 4200 matching lines @@
       </message>
       <message name="IDS_FLAGS_DISABLE_HYPERLINK_AUDITING_DESCRIPTION" desc="Description of the 'Disable hyperlink auditing' lab.">
         Disable sending hyperlink auditing pings.
       </message>
       <message name="IDS_FLAGS_EXPERIMENTAL_LOCATION_FEATURES_NAME" desc="Name of the 'Enable experimental location features' lab.">
         Experimental location features
       </message>
       <message name="IDS_FLAGS_EXPERIMENTAL_LOCATION_FEATURES_DESCRIPTION" desc="Description of the 'Enable experimental location features' lab.">
         Enables experimental extensions to the geolocation feature. Includes using operating system location APIs (where available), and sending additional local network configuration data to the Google location service to provide higher accuracy positioning.
       </message>
+      <message name="IDS_FLAGS_BLOCK_ALL_THIRD_PARTY_COOKIES_NAME" desc="Name of the 'Block all third-party cookies' lab.">
+        Block all third-party cookies
+      </message>
+      <message name="IDS_FLAGS_BLOCK_ALL_THIRD_PARTY_COOKIES_DESCRIPTION" desc="Description of the 'Block all third-party cookies' lab.">
+        When the option to block third-party cookies from being set is enabled, also block third-party cookies from being read.
+      </message>
 
       <!-- Instant -->
       <message name="IDS_INSTANT_OPT_IN_ENABLE" desc="Button shown in the omnibox dropdown for enabling instant">
         Enable...
       </message>
       <message name="IDS_INSTANT_OPT_IN_NO_THANKS" desc="Button shown in the omnibox dropdodown for not enabling instant">
         No thanks
       </message>
       <message name="IDS_INSTANT_OPT_IN_LABEL" desc="Label shown in the omnibox dropdown for enabling instant">
         Enable Instant for faster searching and browsing?
@@ skipping 950 matching lines @@
       <message name="IDS_COOKIES_ASK_EVERY_TIME_RADIO" desc="A radio button in the Content Settings dialog for asking to store cookies and other site data on your computer every time.">
         Ask me when a site tries to set data
       </message>
       <message name="IDS_COOKIES_BLOCK_RADIO" desc="A radio button in the Content Settings dialog for blocking cookies and other site data from being stored on your computer.">
         Block sites from setting any data
       </message>
       <message name="IDS_COOKIES_EXCEPTIONS_BUTTON" desc="A button in the Content Settings dialog for opening cookie storing exception rules dialog.">
         Exceptions...
       </message>
       <message name="IDS_COOKIES_BLOCK_3RDPARTY_CHKBOX" desc="A checkbox in the Content Settings dialog for blocking all 3rd party cookies.">
-        Block all third-party cookies without exception
+        Ignore exceptions and block third-party cookies from being set
       </message>
 
       <!-- Mac users do not close their browser; they quit it. -->
       <if expr="os != 'darwin'">
         <message name="IDS_COOKIES_CLEAR_WHEN_CLOSE_CHKBOX" desc="A checkbox in the Content Settings dialog for removing all cookies on when browser is closed.">
           Clear cookies and other site data when I close my browser
         </message>
       </if>
       <if expr="os == 'darwin'">
         <message name="IDS_COOKIES_CLEAR_WHEN_CLOSE_CHKBOX" desc="A checkbox in the Content Settings dialog for removing all cookies on when browser is quit (Mac).">
@@ skipping 6429 matching lines @@
     </includes>
     <structures fallback_to_english="true">
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
 
   </release>
 </grit>