media: Add a web preference to enable encrypted media

chrome/common/pref_names.h

 // Copyright (c) 2012 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
@@ skipping 129 matching lines @@
 
 extern const char kWebKitDefaultFontSize[];
 extern const char kWebKitDefaultFixedFontSize[];
 extern const char kWebKitMinimumFontSize[];
 extern const char kWebKitMinimumLogicalFontSize[];
 extern const char kWebKitJavascriptEnabled[];
 extern const char kWebKitWebSecurityEnabled[];
 extern const char kWebKitJavascriptCanOpenWindowsAutomatically[];
 extern const char kWebKitLoadsImagesAutomatically[];
 extern const char kWebKitPluginsEnabled[];
+extern const char kWebKitEncryptedMediaEnabled[];
 extern const char kWebKitDomPasteEnabled[];
 extern const char kWebKitTextAreasAreResizable[];
 extern const char kWebkitTabsToLinks[];
 extern const char kWebKitAllowRunningInsecureContent[];
 #if defined(OS_ANDROID)
 extern const char kWebKitFontScaleFactor[];
 extern const char kWebKitForceEnableZoom[];
 extern const char kWebKitPasswordEchoEnabled[];
 #endif
 extern const char kDataSaverEnabled[];
@@ skipping 707 matching lines @@
 extern const char kSearchGeolocationDisclosureLastShowDate[];
 extern const char kSearchGeolocationPreDisclosureMetricsRecorded[];
 extern const char kSearchGeolocationPostDisclosureMetricsRecorded[];
 #endif
 
 extern const char kGoogleDSEGeolocationSetting[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_