[MD settings] rename Search engine settings to Search engine

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- Policy Indicators -->
   <message name="IDS_SETTINGS_CONTROLLED_SETTING_EXTENSION" desc="Text displayed in the controlled settings indicator tooltip when a setting's value is enforced by an extension.">
     This setting is controlled by extension <ph name="NAME">$1<ex>Settings Extension</ex></ph>
   </message>
 
   <!-- Accessibility Page -->
   <message name="IDS_SETTINGS_ACCESSIBILITY" desc="Name of the settings page which displays accessibility preferences.">
@@ skipping 544 matching lines @@
     <ph name="TITLE">$1<ex>Block</ex></ph> - <ph name="COUNT">$2<ex>42</ex></ph>
   </message>
 
   <!-- Reset Settings Page -->
   <message name="IDS_SETTINGS_RESET" desc="Name of the settings page where settings may be reset.">
     Reset
   </message>
 
   <!-- Search Page -->
   <message name="IDS_SETTINGS_SEARCH" desc="Name of the settings page which displays search engine preferences.">
-    Search
+    Search engine
   </message>
   <message name="IDS_SETTINGS_SEARCH_EXPLANATION" desc="Explanation for the search engine dropdown setting.">
     Search engine used when searching from the omnibox
   </message>
   <message name="IDS_SETTINGS_SEARCH_MANAGE_SEARCH_ENGINES" desc="Label for the Manage Search Engines button.">
     Manage search engines
   </message>
   <message name="IDS_SETTINGS_SEARCH_OK_GOOGLE_LABEL" desc="Label for the checkbox which enables the OK Google hotword.">
     Enable "Ok Google" to start a voice search.
   </message>
@@ skipping 496 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>