Enable WebUSB on Android.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 9715feeea9ca3bfcc845098c11905fd82d68c512..7e3b631ab82688230f1a7733f27ab766c874c0d2 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1983,15 +1983,13 @@ const FeatureEntry kFeatureEntries[] = {
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnablePushApiBackgroundMode,
                                switches::kDisablePushApiBackgroundMode)},
 #endif  // defined(ENABLE_BACKGROUND)
-#if !defined(OS_ANDROID) && !defined(OS_IOS)
-     // TODO(reillyg): Remove this flag when the permission granting UI is
-     // available. crbug.com/529950
-     {"enable-webusb-on-any-origin",
-      IDS_FLAGS_ENABLE_WEBUSB_ON_ANY_ORIGIN_NAME,
-      IDS_FLAGS_ENABLE_WEBUSB_ON_ANY_ORIGIN_DESCRIPTION,
-      kOsDesktop,
-      SINGLE_VALUE_TYPE(switches::kEnableWebUsbOnAnyOrigin)},
-#endif
+    // TODO(reillyg): Remove this flag when the permission granting UI is
+    // available. crbug.com/529950
+    {"enable-webusb-on-any-origin",
+     IDS_FLAGS_ENABLE_WEBUSB_ON_ANY_ORIGIN_NAME,
+     IDS_FLAGS_ENABLE_WEBUSB_ON_ANY_ORIGIN_DESCRIPTION,
+     kOsAll,
+     SINGLE_VALUE_TYPE(switches::kEnableWebUsbOnAnyOrigin)},
 #if defined(OS_CHROMEOS)
     {"cros-regions-mode",
      IDS_FLAGS_CROS_REGIONS_MODE_NAME,