Strip out stream counting from AudioRendererHost.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1554 matching lines @@
   if (visible_widgets_ == 0) {
     DCHECK(!is_process_backgrounded_);
     UpdateProcessPriority();
   }
 }
 
 int RenderProcessHostImpl::VisibleWidgetCount() const {
   return visible_widgets_;
 }
 
-void RenderProcessHostImpl::AudioStateChanged() {
+void RenderProcessHostImpl::OnAudioStreamAdded() {
+  ++audio_stream_count_;
   UpdateProcessPriority();
 }
 
+void RenderProcessHostImpl::OnAudioStreamRemoved() {
+  --audio_stream_count_;

[o1ka, 2017/02/07 09:38:02]

DCHECK(audio_stream_count_ > 0)?

[DaleCurtis, 2017/02/07 22:09:16]

Done.

+  UpdateProcessPriority();
+}
+
 bool RenderProcessHostImpl::IsForGuestsOnly() const {
   return is_for_guests_only_;
 }
 
 StoragePartition* RenderProcessHostImpl::GetStoragePartition() const {
   return storage_partition_impl_;
 }
 
 static void AppendCompositorCommandLineFlags(base::CommandLine* command_line) {
   command_line->AppendSwitchASCII(
@@ skipping 1235 matching lines @@
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableRendererPriorityManagement)) {
     return;
   }
 
   // We background a process as soon as it hosts no active audio streams and no
   // visible widgets -- the callers must call this function whenever we
   // transition in/out of those states.
   const bool should_background =
-      visible_widgets_ == 0 && !audio_renderer_host_->HasActiveAudio() &&
+      visible_widgets_ == 0 && audio_stream_count_ == 0 &&
       !base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableRendererBackgrounding);
 
 // TODO(sebsg): Remove this ifdef when https://crbug.com/537671 is fixed.
 #if !defined(OS_ANDROID)
   if (is_process_backgrounded_ == should_background)
     return;
 #endif
 
   TRACE_EVENT1("renderer_host", "RenderProcessHostImpl::UpdateProcessPriority",
@@ skipping 228 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing.
   // Capture the error message in a crash key value.
   base::debug::ScopedCrashKey error_key_value("mojo-message-error", error);
   bad_message::ReceivedBadMessage(render_process_id,
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content