Remove prefixed EME.

content/renderer/renderer_blink_platform_impl.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 "content/renderer/renderer_blink_platform_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 439 matching lines @@
 
 //------------------------------------------------------------------------------
 
 WebMimeRegistry::SupportsType
 RendererBlinkPlatformImpl::MimeRegistry::supportsMediaMIMEType(
     const WebString& mime_type,
     const WebString& codecs,
     const WebString& key_system) {
   const std::string mime_type_ascii = ToASCIIOrEmpty(mime_type);
 
-  if (!key_system.isEmpty()) {
-    // Check whether the key system is supported with the mime_type and codecs.
-
-    // Chromium only supports ASCII parameters.
-    if (!base::IsStringASCII(key_system))
-      return IsNotSupported;
-
-    std::string key_system_ascii =
-        media::GetUnprefixedKeySystemName(base::UTF16ToASCII(
-            base::StringPiece16(key_system)));
-    std::vector<std::string> codec_vector;
-    media::ParseCodecString(ToASCIIOrEmpty(codecs), &codec_vector, true);
-
-    if (!media::PrefixedIsSupportedKeySystemWithMediaMimeType(
-            mime_type_ascii, codec_vector, key_system_ascii)) {
-      return IsNotSupported;
-    }
-
-    // Continue processing the mime_type and codecs.
-  }
+  // TODO(ddorwin): Remove reference |key_system|. https://crbug.com/249976.
+  DCHECK(key_system.isEmpty());
 
   std::vector<std::string> codec_vector;
   media::ParseCodecString(ToASCIIOrEmpty(codecs), &codec_vector, false);
   return static_cast<WebMimeRegistry::SupportsType>(
       media::IsSupportedMediaFormat(mime_type_ascii, codec_vector));
 }
 
 bool RendererBlinkPlatformImpl::MimeRegistry::supportsMediaSourceMIMEType(
     const blink::WebString& mime_type,
     const WebString& codecs) {
@@ skipping 809 matching lines @@
 }
 
 //------------------------------------------------------------------------------
 
 blink::WebTrialTokenValidator*
 RendererBlinkPlatformImpl::trialTokenValidator() {
   return &trial_token_validator_;
 }
 
 }  // namespace content