Replace hide-scrollbars flag with a web setting.

chromecast/browser/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//chromecast/chromecast.gni")
 import("//testing/test.gni")
 import("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
@@ skipping 95 matching lines @@
     "//content/public/utility",
     "//device/geolocation",
     "//gpu",
     "//ipc",
     "//media",
     "//net",
     "//ui/base",
     "//ui/compositor",
     "//ui/display",
     "//ui/gl",
-    "//ui/native_theme:native_theme",
   ]
 
   if (is_linux) {
     sources += [
       "cast_memory_pressure_monitor.cc",
       "cast_memory_pressure_monitor.h",
       "metrics/external_metrics.cc",
       "metrics/external_metrics.h",
     ]
 
@@ skipping 82 matching lines @@
       "android/apk/src/org/chromium/chromecast/shell/CastCrashHandler.java",
       "android/apk/src/org/chromium/chromecast/shell/CastMetricsHelper.java",
       "android/apk/src/org/chromium/chromecast/shell/CastSysInfoAndroid.java",
       "android/apk/src/org/chromium/chromecast/shell/CastWindowAndroid.java",
       "android/apk/src/org/chromium/chromecast/shell/CastWindowManager.java",
     ]
 
     jni_package = "chromecast"
   }
 }