Remove obsolete supportsEncryptedMediaMIMEType() from html_viewer.

mojo/services/html_viewer/webmimeregistry_impl.cc

Index: mojo/services/html_viewer/webmimeregistry_impl.cc
diff --git a/mojo/services/html_viewer/webmimeregistry_impl.cc b/mojo/services/html_viewer/webmimeregistry_impl.cc
index c839610700e7188bd0acb5babd2cd2f2e2c77a98..0b7b689393fafa9eb356646caa8aa924eda1670b 100644
--- a/mojo/services/html_viewer/webmimeregistry_impl.cc
+++ b/mojo/services/html_viewer/webmimeregistry_impl.cc
@@ -101,30 +101,6 @@ bool WebMimeRegistryImpl::supportsMediaSourceMIMEType(
                                                      parsed_codec_ids);
 }
 
-bool WebMimeRegistryImpl::supportsEncryptedMediaMIMEType(
-    const blink::WebString& key_system,
-    const blink::WebString& mime_type,
-    const blink::WebString& codecs) {
-  // Only supports ASCII parameters.
-  if (!base::IsStringASCII(key_system) || !base::IsStringASCII(mime_type) ||
-      !base::IsStringASCII(codecs)) {
-    return false;
-  }
-
-  if (key_system.isEmpty())
-    return false;
-
-  const std::string mime_type_ascii = base::UTF16ToASCII(mime_type);
-
-  std::vector<std::string> codec_vector;
-  bool strip_suffix = !net::IsStrictMediaMimeType(mime_type_ascii);
-  net::ParseCodecString(base::UTF16ToASCII(codecs), &codec_vector,
-                        strip_suffix);
-
-  return media::IsSupportedKeySystemWithMediaMimeType(
-      mime_type_ascii, codec_vector, base::UTF16ToASCII(key_system));
-}
-
 blink::WebMimeRegistry::SupportsType
     WebMimeRegistryImpl::supportsNonImageMIMEType(
     const blink::WebString& mime_type) {