Add EME support for new VP9 codec string in WebM.

media/blink/key_system_config_selector.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 "media/blink/key_system_config_selector.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 305 matching lines @@
     EmeMediaType media_type,
     const std::string& container_mime_type,
     const std::string& codecs,
     KeySystemConfigSelector::ConfigState* config_state) {
   // From RFC6838: "Both top-level type and subtype names are case-insensitive."
   std::string container_lower = base::ToLowerASCII(container_mime_type);
 
   // contentTypes must provide a codec string unless the container implies a
   // particular codec. For EME, none of the currently supported containers
   // imply a codec, so |codecs| must be provided.
-  if (codecs.empty())
+  if (codecs.empty()) {
+    DVLOG(3) << __func__ << " KeySystemConfig for " << container_mime_type
+             << " does not specify necessary codecs.";
     return false;
+  }
 
   // Check that |container_mime_type| and |codecs| are supported by Chrome. This
   // is done primarily to validate extended codecs, but it also ensures that the
   // CDM cannot support codecs that Chrome does not (which could complicate the
   // robustness algorithm).
   if (!IsSupportedMediaFormat(container_lower, codecs,
                               CanUseAesDecryptor(key_system))) {
     return false;
   }
 
@@ skipping 592 matching lines @@
 
 void KeySystemConfigSelector::OnPermissionResult(
     std::unique_ptr<SelectionRequest> request,
     bool is_permission_granted) {
   request->was_permission_requested = true;
   request->is_permission_granted = is_permission_granted;
   SelectConfigInternal(std::move(request));
 }
 
 }  // namespace media