Respect prefs::kAllowDeletingBrowserHistory in the Clear History UI on Android.

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 339 matching lines @@
       </message>
       <message name="IDS_CLEAR_BROWSING_DATA_PROGRESS_TITLE" desc='Title for the progress dialog used when waiting for "clear browsing data" to complete.'>
         Clearing browsing data
       </message>
       <message name="IDS_CLEAR_DATA_DELETE" desc="Button that allows the user to clear their browsing data. [CHAR-LIMIT=20]">
         Clear
       </message>
       <message name="IDS_CLEAR_BROWSING_DATA_PROGRESS_MESSAGE" desc='Message on the progress dialog used when waiting for "clear browsing data" to complete.'>
         Please wait…
       </message>
+      <message name="IDS_CAN_NOT_CLEAR_BROWSING_HISTORY_TOAST" desc="Message on the toast explaining that child account users can not clear their browsing history.">
+        Browsing history can't be cleared with Accounts for Kids.
+      </message>
 
       <!-- Accessibility preferences -->
       <message name="IDS_PREFS_ACCESSIBILITY" desc="Title of Accessibility settings, which allows the user to change webpage font sizes. [CHAR-LIMIT=32]">
         Accessibility
       </message>
       <message name="IDS_FONT_SIZE" desc="Title for font size preference.">
         Text scaling
       </message>
       <message name="IDS_FONT_SIZE_PREVIEW_TEXT" desc="Preview text for font-size slider.">
         Drag the slider until you can read this comfortably. Text should look at least this big after double-tapping on a paragraph.
@@ skipping 937 matching lines @@
       <message name="IDS_FRE_SIGNED_IN_DESCRIPTION_UCA_ADDENDUM" desc="Additional explanation for child accounts that synced settings are managed by parents.">
         Your parents help manage these settings.
       </message>
       <message name="IDS_ACCESSIBILITY_FRE_ACCOUNT_SPINNER" desc="Content description for the first run account drop down spinner.">
         Choose account
       </message>
 
     </messages>
   </release>
 </grit>