Revert 277386 "Fix: Adding list of supported codecs for MP4 cont..."

content/renderer/renderer_webkitplatformsupport_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_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 406 matching lines @@
   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 =
         GetUnprefixedKeySystemName(base::UTF16ToASCII(key_system));
     std::vector<std::string> strict_codecs;
-    net::ParseCodecString(ToASCIIOrEmpty(codecs), &strict_codecs, true);
+    bool strip_suffix = !net::IsStrictMediaMimeType(mime_type_ascii);
+    net::ParseCodecString(ToASCIIOrEmpty(codecs), &strict_codecs, strip_suffix);
 
     if (!IsSupportedKeySystemWithMediaMimeType(
             mime_type_ascii, strict_codecs, key_system_ascii)) {
       return IsNotSupported;
     }
 
     // Continue processing the mime_type and codecs.
   }
 
   // Check list of strict codecs to see if it is supported.
   if (net::IsStrictMediaMimeType(mime_type_ascii)) {
     // Check if the codecs are a perfect match.
     std::vector<std::string> strict_codecs;
     net::ParseCodecString(ToASCIIOrEmpty(codecs), &strict_codecs, false);
-    return static_cast<WebMimeRegistry::SupportsType> (
-        net::IsSupportedStrictMediaMimeType(mime_type_ascii, strict_codecs));
+    if (net::IsSupportedStrictMediaMimeType(mime_type_ascii, strict_codecs))
+      return IsSupported;
+
+    // We support the container, but no codecs were specified.
+    if (codecs.isNull())
+      return MayBeSupported;
+
+    return IsNotSupported;
   }
 
   // If we don't recognize the codec, it's possible we support it.
   std::vector<std::string> parsed_codecs;
   net::ParseCodecString(ToASCIIOrEmpty(codecs), &parsed_codecs, true);
   if (!net::AreSupportedMediaCodecs(parsed_codecs))
     return MayBeSupported;
 
   // Otherwise we have a perfect match.
   return IsSupported;
@@ skipping 681 matching lines @@
   battery_status_dispatcher_->SetListener(listener);
 }
 
 // static
 void RendererWebKitPlatformSupportImpl::MockBatteryStatusChangedForTesting(
     const blink::WebBatteryStatus& status) {
   g_test_battery_status_dispatcher.Get().PostBatteryStatusChange(status);
 }
 
 }  // namespace content