Changing default_url to destination_url for consistency

content/renderer/media/webmediaplayer_impl.cc

Index: content/renderer/media/webmediaplayer_impl.cc
diff --git a/content/renderer/media/webmediaplayer_impl.cc b/content/renderer/media/webmediaplayer_impl.cc
index 6aa009a18f401e9d954f6649fbfd9c073f53c634..41e1e064100b5938674b7d239d0324af29ebc89c 100644
--- a/content/renderer/media/webmediaplayer_impl.cc
+++ b/content/renderer/media/webmediaplayer_impl.cc
@@ -1099,19 +1099,17 @@ void WebMediaPlayerImpl::OnKeyError(const std::string& session_id,
 
 void WebMediaPlayerImpl::OnKeyMessage(const std::string& session_id,
                                       const std::vector<uint8>& message,
-                                      const std::string& default_url) {
+                                      const GURL& destination_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;
+  DCHECK(destination_url.is_empty() || destination_url.is_valid());
 
   client_->keyMessage(
       WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
       WebString::fromUTF8(session_id),
       message.empty() ? NULL : &message[0],
       message.size(),
-      default_url_gurl);
+      destination_url);
 }
 
 void WebMediaPlayerImpl::DataSourceInitialized(const GURL& gurl, bool success) {