Encrypted Media: Use uint32 for systemCode in SessionError.

content/renderer/media/webmediaplayer_impl.cc

 // Copyright 2013 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/media/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 #include <vector>
@@ skipping 1044 matching lines @@
                                  text_track_index_++));
 
   scoped_ptr<media::TextTrack> text_track(
       new TextTrackImpl(main_loop_, client_, web_inband_text_track.Pass()));
 
   done_cb.Run(text_track.Pass());
 }
 
 void WebMediaPlayerImpl::OnKeyError(const std::string& session_id,
                                     media::MediaKeys::KeyError error_code,
-                                    int system_code) {
+                                    uint32 system_code) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
   EmeUMAHistogramEnumeration(current_key_system_, "KeyError",
                              error_code, media::MediaKeys::kMaxKeyError);
 
+  unsigned short short_system_code = 0;
+  if (system_code > std::numeric_limits<unsigned short>::max()) {
+    LOG(WARNING) << "system_code exceeds unsigned short limit.";
+    short_system_code = std::numeric_limits<unsigned short>::max();
+  } else {
+    short_system_code = static_cast<unsigned short>(system_code);
+  }
+
   client_->keyError(
       WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
       WebString::fromUTF8(session_id),
       static_cast<blink::WebMediaPlayerClient::MediaKeyErrorCode>(error_code),
-      system_code);
+      short_system_code);
 }
 
 void WebMediaPlayerImpl::OnKeyMessage(const std::string& session_id,
                                       const std::vector<uint8>& message,
                                       const std::string& default_url) {
   DCHECK(main_loop_->BelongsToCurrentThread());
 
   const GURL default_url_gurl(default_url);
   DLOG_IF(WARNING, !default_url.empty() && !default_url_gurl.is_valid())
       << "Invalid URL in default_url: " << default_url;
@@ skipping 230 matching lines @@
 
   if (web_cdm_) {
     decryptor_ready_cb.Run(web_cdm_->GetDecryptor());
     return;
   }
 
   decryptor_ready_cb_ = decryptor_ready_cb;
 }
 
 }  // namespace content