Remove enable-prefixed-encrypted-media switch

content/public/common/content_switches.cc

 // 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.
 
 #include "build/build_config.h"
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
@@ skipping 175 matching lines @@
     "disable-hide-inactive-stacked-tab-close-buttons";
 
 // Disable the RenderThread's HistogramCustomizer.
 const char kDisableHistogramCustomizer[]    = "disable-histogram-customizer";
 
 // Don't kill a child process when it sends a bad IPC message.  Apart
 // from testing, it is a bad idea from a security perspective to enable
 // this switch.
 const char kDisableKillAfterBadIPC[]        = "disable-kill-after-bad-ipc";
 
-// Enables prefixed Encrypted Media API (e.g. webkitGenerateKeyRequest()).
-const char kEnablePrefixedEncryptedMedia[] =
-    "enable-prefixed-encrypted-media";
-
 // Disables LCD text.
 const char kDisableLCDText[]                = "disable-lcd-text";
 
 // Disables distance field text.
 const char kDisableDistanceFieldText[]      = "disable-distance-field-text";
 
 // Disable LocalStorage.
 const char kDisableLocalStorage[]           = "disable-local-storage";
 
 // Force logging to be disabled.  Logging is enabled by default in debug
@@ skipping 837 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches