Android: Remove the prompt when entering fullscreen mode (behind flag).

chrome/common/chrome_features.cc

 // Copyright 2016 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.
 
 #include "chrome/common/chrome_features.h"
 
 namespace features {
 
 // All features in alphabetical order.
 
@@ skipping 11 matching lines @@
     "LinuxObsoleteSystemIsEndOfTheLine", base::FEATURE_DISABLED_BY_DEFAULT};
 #endif
 
 #if defined(OS_CHROMEOS)
 // Runtime flag that indicates whether this leak detector should be enabled in
 // the current instance of Chrome.
 const base::Feature kRuntimeMemoryLeakDetector{
     "RuntimeMemoryLeakDetector", base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_CHROMEOS)
 
+// A new user experience for transitioning into fullscreen and mouse pointer
+// lock states. The name is a misnomer (for historical reasons); affects both
+// Views and Android builds.
+const base::Feature kSimplifiedFullscreenUI{
+    "ViewsSimplifiedFullscreenUI",
+#if defined(USE_AURA)
+    // Windows, Linux, Chrome OS.
+    base::FEATURE_ENABLED_BY_DEFAULT,
+#else
+    // Mac, Android.
+    base::FEATURE_DISABLED_BY_DEFAULT,
+#endif
+};
+
 }  // namespace features