Revert of chromeos: Move ownership of system tray width from chrome to ash

chrome/app/resources/locale_settings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1" output_all_resource_defines="false">
   <outputs>
     <output filename="grit/locale_settings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="locale_settings_am.pak" type="data_package" lang="am" />
     <output filename="locale_settings_ar.pak" type="data_package" lang="ar" />
     <output filename="locale_settings_bg.pak" type="data_package" lang="bg" />
     <output filename="locale_settings_bn.pak" type="data_package" lang="bn" />
@@ skipping 133 matching lines @@
       <!-- The width of the Extension Wipeout bubble in characters (See above). -->
       <message name="IDS_EXTENSION_WIPEOUT_BUBBLE_WIDTH_CHARS" use_name_for_id="true">
         55
       </message>
 
       <!-- The width of the Extension Toolbar Redesign bubble in characters (See above). -->
       <message name="IDS_EXTENSION_TOOLBAR_REDESIGN_NOTIFICATION_BUBBLE_WIDTH_CHARS" use_name_for_id="true">
         55
       </message>
 
+      <if expr="is_win or is_linux or chromeos">
+        <!-- The width of the ash/ChromeOS system tray menu in pixels. -->
+        <message name="IDS_SYSTEM_TRAY_MENU_BUBBLE_WIDTH_PIXELS" use_name_for_id="true">
+          300
+        </message>
+      </if>
+
       <if expr="is_win">
         <!-- The width of the Conflicting Module bubble in characters (See above). -->
         <message name="IDS_CONFLICTING_MODULE_BUBBLE_WIDTH_CHARS" use_name_for_id="true">
           46
         </message>
       </if>
 
       <if expr="chromeos">
         <!-- The width and height of the Join Wi-Fi network dialog box in -->
         <!-- characters and lines (See above). -->
@@ skipping 141 matching lines @@
       </message>
 
       <!-- Links on the History page. -->
       <message name="IDS_SETTINGS_CLEAR_DATA_WEB_HISTORY_URL_IN_HISTORY" translateable="false">
         https://history.google.com/history/?utm_source=chrome_h
       </message>
 
     </messages>
   </release>
 </grit>