Enable side-by-side beta and dev channels.

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"
       output_all_resource_defines="false" source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/chromium_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
@@ skipping 118 matching lines @@
       <message name="IDS_PROFILES_DISCONNECT_MANAGED_PROFILE_TEXT" desc="Message explaining to the user what will happen if they disconnect the managed profile.">
         Disconnecting <ph name="USERNAME">$1<ex>someone@example.com</ex></ph> will clear your history, bookmarks, settings, and other Chromium data stored on this device. Data stored in your Google Account will not be cleared and can be managed on <ph name="GOOGLE_DASHBOARD_LINK">&lt;a target="_blank" href="$2"&gt;</ph>Google Dashboard<ph name="END_GOOGLE_DASHBOARD_LINK">&lt;/a&gt;</ph>.
       </message>
       <message name="IDS_PRODUCT_NAME" desc="The Chrome application name">
         Chromium
       </message>
       <message name="IDS_SHORT_PRODUCT_NAME" desc="The Chrome application short name.">
         Chromium
       </message>
       <if expr="is_win">
-        <message name="IDS_SXS_SHORTCUT_NAME" desc="The Chrome short cut name for SxS channel">
-          Chromium
+        <message name="IDS_SXS_SHORTCUT_NAME" desc="Unused in Chromium builds" translateable="false">
+        </message>
+        <message name="IDS_SHORTCUT_NAME_BETA" desc="Unused in Chromium builds" translateable="false">
+        </message>
+        <message name="IDS_SHORTCUT_NAME_DEV" desc="Unused in Chromium builds" translateable="false">
         </message>
         <message name="IDS_PRODUCT_DESCRIPTION" desc="Browser description">
           Chromium is a web browser that runs webpages and applications with lightning speed. It's fast, stable, and easy to use. Browse the web more safely with malware and phishing protection built into Chromium.
         </message>
       </if>
       <if expr="chromeos">
         <message name="IDS_PRODUCT_OS_NAME" desc="The Chrome OS application name">
           Chromium OS
         </message>
         <message name="IDS_SHORT_PRODUCT_OS_NAME" desc="The Chrome OS application short name">
@@ skipping 701 matching lines @@
         </if>
       </if>
 
       <!-- App shortcuts -->
       <message name="IDS_APP_SHORTCUTS_SUBDIR_NAME" desc="Name for the Chromium Apps Start Menu folder name.">
         Chromium Apps
       </message>
       <message name="IDS_APP_SHORTCUTS_SUBDIR_NAME_CANARY" desc="Name for the Chrome Apps Start Menu folder name.">
         Chromium Apps
       </message>
+      <if expr="is_win">
+        <message name="IDS_APP_SHORTCUTS_SUBDIR_NAME_BETA" desc="Unused in Chromium builds" translateable="false">
+        </message>
+        <message name="IDS_APP_SHORTCUTS_SUBDIR_NAME_DEV" desc="Unused in Chromium builds" translateable="false">
+        </message>
+      </if>
 
       <!-- Chrome Conflicts bubble -->
       <if expr="is_win">
         <message name="IDS_OPTIONS_CONFLICTING_MODULE" desc="Shown in a bubble when a conflict has been detected.">
           Software running on your computer is incompatible with Chromium.
         </message>
       </if>
 
       <!-- Chrome OS OOBE Terms of Service screen-->
       <if expr="chromeos">
@@ skipping 118 matching lines @@
       <!-- Webstore strings -->
       <message name="IDS_WEBSTORE_APP_DESCRIPTION" desc="Description for the WebStore app.">
         Discover great apps, games, extensions and themes for Chromium.
       </message>
 
       <!-- Windows firewall rule strings. -->
       <if expr="is_win">
         <message name="IDS_INBOUND_MDNS_RULE_NAME" desc="The name of the firewall rule allowing inbound mDNS traffic.">
           Chromium (mDNS-In)
         </message>
-        <message name="IDS_INBOUND_MDNS_RULE_NAME_CANARY" desc="The name of the firewall rule allowing inbound mDNS traffic for canary.">
-          Chromium (mDNS-In)
+        <message name="IDS_INBOUND_MDNS_RULE_NAME_BETA" desc="Unused in Chromium builds" translateable="false">
+        </message>
+        <message name="IDS_INBOUND_MDNS_RULE_NAME_CANARY" desc="Unused in Chromium builds" translateable="false">
+        </message>
+        <message name="IDS_INBOUND_MDNS_RULE_NAME_DEV" desc="Unused in Chromium builds" translateable="false">
         </message>
         <message name="IDS_INBOUND_MDNS_RULE_DESCRIPTION" desc="The description of the firewall rule allowing inbound mDNS traffic.">
           Inbound rule for Chromium to allow mDNS traffic.
         </message>
-        <message name="IDS_INBOUND_MDNS_RULE_DESCRIPTION_CANARY" desc="The description of the firewall rule allowing inbound mDNS traffic canary.">
-          Inbound rule for Chromium to allow mDNS traffic.
+        <message name="IDS_INBOUND_MDNS_RULE_DESCRIPTION_BETA" desc="Unused in Chromium builds" translateable="false">
+        </message>
+        <message name="IDS_INBOUND_MDNS_RULE_DESCRIPTION_CANARY" desc="Unused in Chromium builds" translateable="false">
+        </message>
+        <message name="IDS_INBOUND_MDNS_RULE_DESCRIPTION_DEV" desc="Unused in Chromium builds" translateable="false">
         </message>
       </if>
 
       <if expr="not is_android">
         <message name="IDS_CONTENT_CONTEXT_SPELLING_BUBBLE_TEXT" desc="The text of a bubble that confirms users allows integrating the spelling service of Google to Chrome.">
           Chromium can provide smarter spell-checking by sending what you type in the browser to Google servers, allowing you to use the same spell-checking technology used by Google search.
         </message>
         <message name="IDS_RESET_PROFILE_SETTINGS_FEEDBACK" desc="Feedback label in the Reset Profile Settings dialog">
           Help make Chromium better by reporting the current settings
         </message>
@@ skipping 228 matching lines @@
         <message name="IDS_WIN10_WELCOME_PIN_SUBHEADING" desc="A subheading on a section which gives instructions on how to pin Chromium to the Windows 10 taskbar.">
           Pin Chromium to your taskbar
         </message>
         <message name="IDS_WIN10_WELCOME_SELECT" desc="An instruction asking the user to select Chromium from an external list of apps.">
           Select <ph name="SMALL_PRODUCT_LOGO">&lt;div class="logo-small"&gt;&lt;/div&gt;</ph> <ph name="BEGIN_BOLD">&lt;strong&gt;</ph>Chromium<ph name="END_BOLD">&lt;/strong&gt;</ph>
         </message>
       </if>
     </messages>
   </release>
 </grit>