Enable WebUSB through the Experimental Framework.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 5ae5889b420e29b99a28fb28f4adea6af19029da..8bb7ef2d57186aa7f0ce4610329d2a6c7426e220 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -2761,11 +2761,7 @@ void ChromeContentBrowserClient::RegisterFrameMojoShellServices(
 void ChromeContentBrowserClient::RegisterRenderFrameMojoServices(
     content::ServiceRegistry* registry,
     content::RenderFrameHost* render_frame_host) {
-  // WebUSB is an experimental web API. It will only work if the experiment
-  // is enabled and WebUSB feature is enabled.
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableExperimentalWebPlatformFeatures) &&
-      base::FeatureList::IsEnabled(features::kWebUsb)) {
+  if (base::FeatureList::IsEnabled(features::kWebUsb)) {
     registry->AddService(
         base::Bind(&CreateUsbDeviceManager, render_frame_host));
     registry->AddService(