[scheduler] Teach scheduler about audio state

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 864 matching lines @@
 
     ++number_of_messages;
     IPC::Message* message_copy = new IPC::Message(*message);
     message_copy->set_routing_id(rfh->GetRoutingID());
     rfh->Send(message_copy);
   }
   delete message;
   return number_of_messages;
 }
 
+int WebContentsImpl::SendToAllViews(IPC::Message* message) {

[clamy, 2016/10/05 12:11:35]

I think it would make a lot more sense to have the ViewMsg_AudioStateChanged
become a FrameMsg_AudioStateChanged rather than add this function. On top of
that it is a bit misleading since it may potentially send the same IPC multiple
times to the same view (if several frames share the same view).

[altimin, 2016/10/05 13:26:37]

Done.

+  std::unordered_set<RenderViewHost*> render_view_hosts;
+  for (RenderFrameHost* rfh : GetAllFrames()) {
+    if (!rfh->IsRenderFrameLive())
+      continue;
+
+    render_view_hosts.insert(rfh->GetRenderViewHost());
+  }
+
+  int number_of_messages = 0;
+  for (RenderViewHost* rvh : render_view_hosts) {
+    if (!rvh->IsRenderViewLive())
+      continue;
+
+    ++number_of_messages;
+    IPC::Message* message_copy = new IPC::Message(*message);
+    message_copy->set_routing_id(rvh->GetRoutingID());
+    rvh->Send(message_copy);
+  }
+  delete message;
+  return number_of_messages;
+}
+
 void WebContentsImpl::SendPageMessage(IPC::Message* msg) {
   frame_tree_.root()->render_manager()->SendPageMessage(msg, nullptr);
 }
 
 RenderViewHostImpl* WebContentsImpl::GetRenderViewHost() const {
   return GetRenderManager()->current_host();
 }
 
 int WebContentsImpl::GetRoutingID() const {
   if (!GetRenderViewHost())
@@ skipping 376 matching lines @@
       audio_muter_.reset(new WebContentsAudioMuter(this));
     audio_muter_->StartMuting();
   } else {
     DCHECK(audio_muter_);
     audio_muter_->StopMuting();
   }
 
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DidUpdateAudioMutingState(mute));
 
-  // Notification for UI updates in response to the changed muting state.
-  NotifyNavigationStateChanged(INVALIDATE_TYPE_TAB);
+  OnAudioStateChanged(!mute && audio_stream_monitor_.IsCurrentlyAudible());
 }
 
 bool WebContentsImpl::IsConnectedToBluetoothDevice() const {
   return bluetooth_connected_device_count_ > 0;
 }
 
 bool WebContentsImpl::IsCrashed() const {
   return (crashed_status_ == base::TERMINATION_STATUS_PROCESS_CRASHED ||
           crashed_status_ == base::TERMINATION_STATUS_ABNORMAL_TERMINATION ||
           crashed_status_ == base::TERMINATION_STATUS_PROCESS_WAS_KILLED ||
@@ skipping 39 matching lines @@
     media_web_contents_observer_->MaybeUpdateAudibleState();
   }
 
   if (delegate_)
     delegate_->NavigationStateChanged(this, changed_flags);
 
   if (GetOuterWebContents())
     GetOuterWebContents()->NotifyNavigationStateChanged(changed_flags);
 }
 
+void WebContentsImpl::OnAudioStateChanged(bool is_audio_playing) {
+  SendToAllViews(
+      new ViewMsg_AudioStateChanged(GetRoutingID(), is_audio_playing));
+
+  // Notification for UI updates in response to the changed muting state.
+  NotifyNavigationStateChanged(INVALIDATE_TYPE_TAB);
+}
+
 base::TimeTicks WebContentsImpl::GetLastActiveTime() const {
   return last_active_time_;
 }
 
 void WebContentsImpl::SetLastActiveTime(base::TimeTicks last_active_time) {
   last_active_time_ = last_active_time;
 }
 
 void WebContentsImpl::WasShown() {
   controller_.SetActive(true);
@@ skipping 3915 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