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

content/gpu/gpu_main.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 <stddef.h>
 #include <stdlib.h>
 
 #include <memory>
 #include <utility>
 
@@ skipping 146 matching lines @@
 
 #if !defined(OS_CHROMEOS)
   DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kWindowDepth));
   DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kX11VisualID));
 #endif
 
 #endif
 
-  logging::SetLogMessageHandler(GpuProcessLogMessageHandler);
+  logging::PushLogMessageHandler(GpuProcessLogMessageHandler);
 
   if (command_line.HasSwitch(switches::kSupportsDualGpus)) {
     std::string types = command_line.GetSwitchValueASCII(
         switches::kGpuDriverBugWorkarounds);
     std::set<int> workarounds;
     gpu::StringToFeatureSet(types, &workarounds);
     if (workarounds.count(gpu::FORCE_DISCRETE_GPU) == 1)
       ui::GpuSwitchingManager::GetInstance()->ForceUseOfDiscreteGpu();
     else if (workarounds.count(gpu::FORCE_INTEGRATED_GPU) == 1)
       ui::GpuSwitchingManager::GetInstance()->ForceUseOfIntegratedGpu();
@@ skipping 198 matching lines @@
     }
 #elif defined(OS_WIN)
     gpu_info.sandboxed = StartSandboxWindows(parameters.sandbox_info);
 #elif defined(OS_MACOSX)
     gpu_info.sandboxed = Sandbox::SandboxIsCurrentlyActive();
 #endif
   } else {
     dead_on_arrival = true;
   }
 
-  logging::SetLogMessageHandler(NULL);
+  logging::PopLogMessageHandler();
 
   std::unique_ptr<gpu::GpuMemoryBufferFactory> gpu_memory_buffer_factory;
   if (gpu::GetNativeGpuMemoryBufferType() != gfx::EMPTY_BUFFER)
     gpu_memory_buffer_factory = gpu::GpuMemoryBufferFactory::CreateNativeType();
 
   base::ThreadPriority io_thread_priority = base::ThreadPriority::NORMAL;
 #if defined(OS_ANDROID) || defined(OS_CHROMEOS)
   io_thread_priority = base::ThreadPriority::DISPLAY;
 #endif
 
@@ skipping 221 matching lines @@
     return true;
   }
 
   return false;
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace.
 
 }  // namespace content