Allow multiple logging::LogMessage{Handler,Listener}s

content/gpu/gpu_child_thread.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/gpu/gpu_child_thread.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 200 matching lines @@
 GpuChildThread::~GpuChildThread() {
   while (!deferred_messages_.empty()) {
     delete deferred_messages_.front();
     deferred_messages_.pop();
   }
   g_lazy_tls.Pointer()->Set(nullptr);
 }
 
 void GpuChildThread::Shutdown() {
   ChildThreadImpl::Shutdown();
-  logging::SetLogMessageHandler(NULL);
+  if (!in_browser_process_)
+    logging::PopLogMessageHandler();
 }
 
 void GpuChildThread::Init(const base::Time& process_start_time) {
   process_start_time_ = process_start_time;
 
 #if defined(OS_ANDROID)
   // When running in in-process mode, this has been set in the browser at
   // ChromeBrowserMainPartsAndroid::PreMainMessageLoopRun().
   if (!in_browser_process_)
     media::SetMediaClientAndroid(GetContentClient()->GetMediaClientAndroid());
@@ skipping 135 matching lines @@
 
   if (dead_on_arrival_) {
     LOG(ERROR) << "Exiting GPU process due to errors during initialization";
     base::MessageLoop::current()->QuitWhenIdle();
     return;
   }
 
   // We don't need to pipe log messages if we are running the GPU thread in
   // the browser process.
   if (!in_browser_process_)
-    logging::SetLogMessageHandler(GpuProcessLogMessageHandler);
+    logging::PushLogMessageHandler(GpuProcessLogMessageHandler);
 
   gpu::SyncPointManager* sync_point_manager = nullptr;
   // Note SyncPointManager from ContentGpuClient cannot be owned by this.
   if (GetContentClient()->gpu())
     sync_point_manager = GetContentClient()->gpu()->GetSyncPointManager();
   if (!sync_point_manager) {
     if (!owned_sync_point_manager_) {
       owned_sync_point_manager_.reset(new gpu::SyncPointManager(false));
     }
     sync_point_manager = owned_sync_point_manager_.get();
@@ skipping 172 matching lines @@
 
 void GpuChildThread::BindProcessControlRequest(
     mojo::InterfaceRequest<mojom::ProcessControl> request) {
   DVLOG(1) << "GPU: Binding ProcessControl request";
   DCHECK(process_control_);
   process_control_bindings_.AddBinding(process_control_.get(),
                                        std::move(request));
 }
 
 }  // namespace content