Delete the auto-launch trial.

chrome/app/google_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are specific to
 Google Chrome. These strings will be translated for each locale that Google
 Chrome supports. If you update this file, be sure also to update
 chromium_strings.grd. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/google_chrome_strings.h" type="rc_header">
@@ skipping 527 matching lines @@
         other {# downloads are currently in progress. Do you want to cancel the downloads and exit Google Chrome?}}
       </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.">
           Google Chrome 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 Chrome was automatically launched on startup">
-          Google Chrome 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 Chrome 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 Chrome 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 Google Chrome.
       </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 Google Chrome 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 Chrome as default' browser button">
           Make Google Chrome 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 Chrome the default browser">
           Make Google Chrome 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 Chrome apps.
         </message>
       </if>
 
     </messages>
   </release>
 </grit>