Split MediaSessionStateChanged() and MediaSessionMetadataChanged()

content/browser/web_contents/web_contents_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/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 3800 matching lines @@
       static_cast<RenderViewHostImpl*>(render_view_message_source_);
   if (!rvhi->is_active())
     return;
 
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DidUpdateFaviconURL(candidates));
 }
 
 void WebContentsImpl::OnMediaSessionStateChanged() {
   MediaSession* session = MediaSession::Get(this);
-  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
-                    MediaSessionStateChanged(session->IsControllable(),
-                                             session->IsSuspended(),
-                                             session->metadata()));
+  for (auto& observer : observers_) {
+    observer.MediaSessionStateChanged(session->IsControllable(),
+                                       session->IsSuspended());
+  }
+}
+
+void WebContentsImpl::OnMediaSessionMetadataChanged() {
+  MediaSession* session = MediaSession::Get(this);
+  for (auto& observer : observers_) {
+    observer.MediaSessionMetadataChanged(session->metadata());
+  }
 }
 
 void WebContentsImpl::ResumeMediaSession() {
   MediaSession::Get(this)->Resume(MediaSession::SuspendType::UI);
 }
 
 void WebContentsImpl::SuspendMediaSession() {
   MediaSession::Get(this)->Suspend(MediaSession::SuspendType::UI);
 }
 
@@ skipping 1413 matching lines @@
   dialog_manager_ = dialog_manager;
 }
 
 void WebContentsImpl::RemoveBindingSet(const std::string& interface_name) {
   auto it = binding_sets_.find(interface_name);
   if (it != binding_sets_.end())
     binding_sets_.erase(it);
 }
 
 }  // namespace content