Allow suppressed EME canPlayType() responses to be overridden with a flag.

chrome/browser/about_flags.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 "chrome/browser/about_flags.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 737 matching lines @@
     SINGLE_VALUE_TYPE(switches::kEnableEncryptedMedia)
   },
   {
     "disable-encrypted-media",
     IDS_FLAGS_DISABLE_PREFIXED_ENCRYPTED_MEDIA_NAME,
     IDS_FLAGS_DISABLE_PREFIXED_ENCRYPTED_MEDIA_DESCRIPTION,
     kOsDesktop,
     SINGLE_VALUE_TYPE(switches::kDisableLegacyEncryptedMedia)
   },
   {
+    "override-encrypted-media-canplaytype",
+    IDS_FLAGS_ENCRYPTED_MEDIA_CANPLAYTYPE_OVERRIDE_NAME,
+    IDS_FLAGS_ENCRYPTED_MEDIA_CANPLAYTYPE_OVERRIDE_DESCRIPTION,
+    kOsMac | kOsWin,
+    SINGLE_VALUE_TYPE(switches::kOverrideEncryptedMediaCanPlayType)
+  },
+  {
     "enable-opus-playback",
     IDS_FLAGS_ENABLE_OPUS_PLAYBACK_NAME,
     IDS_FLAGS_ENABLE_OPUS_PLAYBACK_DESCRIPTION,
     kOsDesktop,
     SINGLE_VALUE_TYPE(switches::kEnableOpusPlayback)
   },
  {
     "enable-vp8-alpha-playback",
     IDS_FLAGS_ENABLE_VP8_ALPHA_PLAYBACK_NAME,
     IDS_FLAGS_ENABLE_VP8_ALPHA_PLAYBACK_DESCRIPTION,
@@ skipping 1274 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags