Delete the auto-launch trial.

chrome/app/chromium_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are distribution specific.
 If you update this file, be sure also to update google_chrome_strings.grd. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/chromium_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
@@ skipping 525 matching lines @@
         other {# downloads are currently in progress. Do you want to cancel the downloads and exit Chromium?}}
       </message>
 
       <!-- Quit all apps confirmation dialog -->
       <if expr="is_macosx">
         <message name="IDS_QUIT_WITH_APPS_TITLE" desc="Title for a notification explaining that Chrome is running in the background.">
           Chromium is in background mode.
         </message>
       </if>
 
-      <!-- Autolaunch infobar -->
-      <if expr="is_win">
-        <message name="IDS_AUTO_LAUNCH_INFOBAR_TEXT" desc="The text to show in the infobar when Chromium was automatically launched on startup">
-          Chromium is configured to automatically launch when you start your computer.
-        </message>
-      </if>
-
       <!-- about:flags -->
       <message name="IDS_FLAGS_ENABLE_IFRAME_BASED_SIGNIN_NAME" desc="Title for the flag to enable iframe-based sign-in flows.">
         Enables iframe-based Chromium sign-in flows. This flag overrides --enable-web-based-signin.
       </message>
       <message name="IDS_FLAGS_ENABLE_IFRAME_BASED_SIGNIN_DESCRIPTION" desc="Description for the flag to enable iframe-based sign-in flows">
         When enabled, will use an iframe-based Chromium sign-in flow; otherwise uses a webview-based flow.
       </message>
       <message name="IDS_FLAGS_DEBUG_SHORTCUTS_DESCRIPTION" desc="Description of the 'Debugging keyboard shortcuts' lab.">
         Enables additional keyboard shortcuts that are useful for debugging Chromium.
       </message>
@@ skipping 444 matching lines @@
 
       <!-- Mac First-run dialog messages -->
       <if expr="is_macosx">
         <message name="IDS_FIRSTRUN_DLG_MAC_SET_DEFAULT_BROWSER_LABEL" desc="Label for checkbox that sets the default browser">
           Set Chromium as your default browser
         </message>
       </if>
 
       <!-- chrome://settings. Android uses native UI for settings -->
       <if expr="not is_android">
-        <message name="IDS_AUTOLAUNCH_TEXT" desc="The text displayed in settings to explain whether Chromium is set to auto-launch on startup or not.">
-          Launch Chromium automatically when your computer starts
-        </message>
         <message name="IDS_OPTIONS_DEFAULTBROWSER_USEASDEFAULT" desc="The label of the 'Use Chromium as default' browser button">
           Make Chromium the default browser
         </message>
       </if>
 
       <!-- Toast experiment. -->
       <if expr="is_win">
         <message name="IDS_TRY_TOAST_SET_DEFAULT" desc="Text of the checkbox to make Chromium the default browser">
           Make Chromium the default browser
         </message>
@@ skipping 253 matching lines @@
         </message>
         <message name="IDS_WIN_PROMPT_TO_CLOSE_APPS_FOR_DESKTOP"
                  desc="Modal message box prompt shown to the user after requesting to relaunch in Desktop mode while packaged apps are running, which will require all packaged apps to be closed and then restarted. Dialog is shown with choices: OK, Cancel.">
           Relaunching in Desktop mode will close and relaunch your Chromium apps.
         </message>
       </if>
 
     </messages>
   </release>
 </grit>