Add flag to switch Chromium OS Bluetooth backend

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index b15ddb69988c13e71024c865ef914f060a4eb9a0..d3dddb71171f9a48cfd1cffec7d842ab80354488 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6904,6 +6904,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
         <message name="IDS_FLAGS_FORCE_FULLSCREEN_APP_DESCRIPTION" desc="Description for the flag to force kiosk applications to run in full screen.">
           Force kiosk applications to run in full screen.
         </message>
+        <message name="IDS_FLAGS_ENABLE_EXPERIMENTAL_BLUETOOTH_NAME" desc="Name for the flag to enable experimental Bluetooth features.">
+          Enable experimental Bluetooth features.
+        </message>
+        <message name="IDS_FLAGS_ENABLE_EXPERIMENTAL_BLUETOOTH_DESCRIPTION" desc="Description for the flag to enable experimental Bluetooth features.">
+          Enable experimental Bluetooth features.
+        </message>
       </if>
 
       <message name="IDS_FLAGS_OLD_CHECKBOX_STYLE" desc="Name of the flag to turn off the new checkbox style.">