Add warning to Mac that passwords are shared between profiles through the underlying keychain.

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.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 8037 matching lines @@
       <if expr="pp_ifdef('use_titlecase')">
         <message name="IDS_OPTIONS_PASSWORDS_MANAGE_PASSWORDS" desc="In Title Case: The label of the 'Manage saved passwords' button">
           Manage Saved Passwords...
         </message>
       </if>
       <if expr="not pp_ifdef('use_titlecase')">
         <message name="IDS_OPTIONS_PASSWORDS_MANAGE_PASSWORDS" desc="In sentence case: The label of the 'Manage saved passwords' button">
           Manage saved passwords...
         </message>
       </if>
+      <message name="IDS_OPTIONS_PASSWORDS_MAC_WARNING" desc="The warning for OS X that passwords are shared across profiles in the keychain.">
+          On Mac, passwords are saved to your Keychain and may be accessed or synced by other Chrome users sharing this OS X account.
+      </message>
       <message name="IDS_OPTIONS_PASSWORDS_AUTOLOGIN" desc="The label of the 'autologinEnabled' checkbox">
         Offer to sign into Google sites automatically with this account
       </message>
       <if expr="not pp_ifdef('use_titlecase')">
         <message name="IDS_AUTOFILL_SETTING_WINDOWS_GROUP_NAME" desc="The title of the form Autofill group">
           Form autofill
         </message>
         <message name="IDS_OPTIONS_PASSWORDS_GROUP_NAME" desc="The title of the 'Passwords' group">
           Passwords
         </message>
@@ skipping 6461 matching lines @@
     </messages>
     <structures fallback_to_english="true">
       <!-- Make sure these stay in sync with the structures in generated_resources.grd. -->
       <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>