Enable Device Discovery by default on Linux, ChromeOS and Windows.

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 fcd12dc3079de1f668181b16742b97c2a09ac794..e29ea2ca12e5e2e438b065f7f82539e0fea8d3e8 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5459,11 +5459,11 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_SAVE_PAGE_AS_MHTML_DESCRIPTION" desc="Description of the 'Save Page as MHTML' lab.">
         Disables saving pages as HTML-only or HTML Complete; enables saving pages only as MHTML: a single text file containing HTML and all sub-resources.
       </message>
-      <message name="IDS_FLAGS_ENABLE_DEVICE_DISCOVERY_NAME" desc="Title of the enable 'device discovery' flag.">
-        Device Discovery
+      <message name="IDS_FLAGS_DISABLE_DEVICE_DISCOVERY_NAME" desc="Title of the disable 'disable device discovery' flag.">
+        Disable Device Discovery
       </message>
-      <message name="IDS_FLAGS_ENABLE_DEVICE_DISCOVERY_DESCRIPTION" desc="Description for 'device discovery' flag.">
-        Enables experimental device discovery on local network.
+      <message name="IDS_FLAGS_DISABLE_DEVICE_DISCOVERY_DESCRIPTION" desc="Description for 'disable device discovery' flag.">
+        Disable device discovery on local network.
       </message>
       <message name="IDS_FLAGS_TOUCH_OPTIMIZED_UI_NAME" desc="Title of the touch-optimized UI flag." >
         Touch Optimized UI