Add the Play Store app search to the launcher.

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 8447 matching lines @@
         <message name="IDS_APP_CONTEXT_MENU_OPEN_TAB"
                  desc="Text for the button that opens the app in a tab. (In sentence case.)">
           Open in a tab
         </message>
         <if expr="chromeos">
           <message name="IDS_APP_CONTEXT_MENU_ACTIVATE_ARC"
                    desc="Text for the button that activates Android App. (In sentence case.)">
             Open
           </message>
         </if>
+        <message name="IDS_APP_CONTEXT_MENU_INSTALL"
+                 desc="Text for the button that installs the app. (In sentence case.)">
+          Install
+        </message>
       </if>
 
       <if expr="use_titlecase">
         <message name="IDS_NEW_TAB_APP_OPTIONS"
                  desc="Text for the context menu item that takes the user to the options of an app. (In title case.)">
           Options
         </message>
         <message name="IDS_NEW_TAB_APP_DETAILS"
                  desc="Text for the context menu item that takes the user to the app in Web Store. (In title case.)">
           View in Web Store
@@ skipping 37 matching lines @@
         <message name="IDS_APP_CONTEXT_MENU_OPEN_TAB"
                  desc="Text for the button that opens the app in a tab. (In title case.)">
           Open in a Tab
         </message>
         <if expr="chromeos">
           <message name="IDS_APP_CONTEXT_MENU_ACTIVATE_ARC"
                    desc="Text for the button that activates Android App. (In title case.)">
             Open
           </message>
         </if>
+        <message name="IDS_APP_CONTEXT_MENU_INSTALL"
+                 desc="Text for the button that installs the app. (In sentence case.)">
+          Install
+        </message>
       </if>
 
       <!-- Multi-profile -->
       <message name="IDS_PROFILES_OPTIONS_GROUP_NAME" desc="The name of the sync group in the options dialog when using the new Profiles UI.">
         People
       </message>
       <if expr="is_macosx">
         <message name="IDS_PROFILES_BUBBLE_ACCESSIBLE_NAME" desc="Title of the avatar bubble menu for accessibility">
           Switch Users
         </message>
@@ skipping 3809 matching lines @@
 
     <!-- VR specific strings -->
     <if expr="enable_vr">
       <message name="IDS_PRESS_APP_TO_EXIT" desc="Text displayed in a transient bubble to tell users how to return from cinema mode (where the page displayed in a cinema like environment) or presentation mode (where the WebVR page occupies the entire screen) to normal mode.">
         Press App button to exit
       </message>
     </if>
   </messages>
  </release>
 </grit>