Enable the mediaControlsOverlayPlayButtonEnabled setting on Android

content/renderer/web_preferences.cc

 // Copyright 2013 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 "content/public/renderer/web_preferences.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/web/WebKit.h"
@@ skipping 298 matching lines @@
   settings->setSelectionIncludesAltImageText(true);
 
 #if defined(OS_ANDROID)
   settings->setAllowCustomScrollbarInMainFrame(false);
   settings->setTextAutosizingEnabled(prefs.text_autosizing_enabled);
   settings->setAccessibilityFontScaleFactor(prefs.font_scale_factor);
   settings->setDeviceScaleAdjustment(prefs.device_scale_adjustment);
   web_view->setIgnoreViewportTagScaleLimits(prefs.force_enable_zoom);
   settings->setAutoZoomFocusedNodeToLegibleScale(true);
   settings->setDoubleTapToZoomEnabled(prefs.double_tap_to_zoom_enabled);
+  settings->setMediaControlsOverlayPlayButtonEnabled(true);
   settings->setMediaPlaybackRequiresUserGesture(
       prefs.user_gesture_required_for_media_playback);
   settings->setDefaultVideoPosterURL(
         base::ASCIIToUTF16(prefs.default_video_poster_url.spec()));
   settings->setSupportDeprecatedTargetDensityDPI(
       prefs.support_deprecated_target_density_dpi);
   settings->setUseLegacyBackgroundSizeShorthandBehavior(
       prefs.use_legacy_background_size_shorthand_behavior);
   settings->setWideViewportQuirkEnabled(prefs.wide_viewport_quirk);
   settings->setUseWideViewport(prefs.use_wide_viewport);
@@ skipping 20 matching lines @@
   settings->setPinchVirtualViewportEnabled(
       prefs.pinch_virtual_viewport_enabled);
 
   settings->setPinchOverlayScrollbarThickness(
       prefs.pinch_overlay_scrollbar_thickness);
   settings->setUseSolidColorScrollbars(prefs.use_solid_color_scrollbars);
   settings->setCompositorTouchHitTesting(prefs.compositor_touch_hit_testing);
 }
 
 }  // namespace content