Don't update Media.EME.KeySystemSupport UMA for unprefixed EME

media/blink/webencryptedmediaclient_impl.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 "webencryptedmediaclient_impl.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "media/base/key_systems.h"
@@ skipping 15 matching lines @@
   //   - audioCapabilitys: audio/mp4 or audio/webm.
   //   - videoCapabilitys: video/mp4 or video/webm.
   // http://crbug.com/429781.
   std::string container = base::StringToLowerASCII(mime_type);
 
   // TODO(sandersd): Strict checking for codecs. http://crbug.com/374751.
   bool strip_codec_suffixes = !net::IsStrictMediaMimeType(container);
   std::vector<std::string> codec_vector;
   net::ParseCodecString(codecs, &codec_vector, strip_codec_suffixes);
   return IsSupportedKeySystemWithMediaMimeType(container, codec_vector,
-                                               key_system);
+                                               key_system, false);
 }
 
 static bool GetSupportedConfiguration(
     const std::string& key_system,
     const blink::WebMediaKeySystemConfiguration& candidate,
     const blink::WebSecurityOrigin& security_origin,
     blink::WebMediaKeySystemConfiguration* accumulated_configuration) {
   if (!candidate.initDataTypes.isEmpty()) {
     std::vector<blink::WebString> init_data_types;
 
@@ skipping 144 matching lines @@
       return;
     }
   }
 
   // 7.4 Reject promise with a new DOMException whose name is NotSupportedError.
   request.requestNotSupported(
       "None of the requested configurations were supported.");
 }
 
 }  // namespace media