Hook up WebRTC logging extension API to the underlying functionality.

chrome/common/extensions/api/webrtc_logging_private.idl

 // 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.
 
 // Use the <code>chrome.webrtcLoggingPrivate</code> API to control diagnostic
 // WebRTC logging.
 [nodoc] namespace webrtcLoggingPrivate {
+  dictionary MetaDataEntry {
+    // The meta data entry key.
+    DOMString key;
+
+    // The meta data entry value.
+    DOMString value;
+  };
+
   dictionary UploadResult {
     // The report ID for the uploaded log. Will be empty if not successful.
     DOMString reportId;
   };
 
   callback GenericDoneCallback = void ();
   callback UploadDoneCallback = void (UploadResult result);
 
   interface Functions {
     // Sets additional custom meta data that will be uploaded along with the
     // log. |metaData| is a dictionary of the metadata (key, value).
-    static void setMetaData(object metaData, GenericDoneCallback callback);
+    static void setMetaData(MetaDataEntry[] metaData,
+                            GenericDoneCallback callback);
 
     // Starts logging. If logging has already been started for this render
     // process, the call will be ignored. |appSessionId| is the unique session
     // ID which will be added to the log.
     static void start(GenericDoneCallback callback);
 
     // Sets whether the log should be uploaded automatically for the case when
     // the render process goes away (tab is closed or crashes) and stop has not
     // been called before that. If |shouldUpload| is true it will be uploaded,
     // otherwise it will be discarded. The default setting is to discard it.
     static void setUploadOnRenderClose(boolean shouldUpload);
 
     // Stops logging. After stop has finished, either upload() or discard()
     // should be called, otherwise the log will be kept in memory until the
     // render process is closed or logging restarted.
     static void stop(GenericDoneCallback callback);
 
     // Uploads the log. Logging must be stopped before this function is called.
     static void upload(UploadDoneCallback callback);
 
     // Discards the log. Logging must be stopped before this function is called.
     static void discard(GenericDoneCallback callback);
   };
 };