media: Add a web preference to enable encrypted media

content/public/common/web_preferences.cc

 // Copyright 2014 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/common/web_preferences.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "third_party/WebKit/public/web/WebSettings.h"
@@ skipping 62 matching lines @@
       context_menu_on_mouse_up(true),
 #else
       context_menu_on_mouse_up(false),
 #endif
       javascript_enabled(true),
       web_security_enabled(true),
       javascript_can_open_windows_automatically(true),
       loads_images_automatically(true),
       images_enabled(true),
       plugins_enabled(true),
+      encrypted_media_enabled(true),
       dom_paste_enabled(false),  // enables execCommand("paste")
       shrinks_standalone_images_to_fit(true),
       text_areas_are_resizable(true),
       allow_scripts_to_close_windows(false),
       remote_fonts_enabled(true),
       javascript_can_access_clipboard(false),
       xslt_enabled(true),
       xss_auditor_enabled(true),
       dns_prefetching_enabled(true),
       data_saver_enabled(false),
@@ skipping 144 matching lines @@
   pictograph_font_family_map[kCommonScript] =
       base::ASCIIToUTF16("Times New Roman");
 }
 
 WebPreferences::WebPreferences(const WebPreferences& other) = default;
 
 WebPreferences::~WebPreferences() {
 }
 
 }  // namespace content