Avoid GpuPreferences exposed in content public gpu interface

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"
 #include "base/lazy_instance.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/threading/thread_local.h"
 #include "base/threading/worker_pool.h"
 #include "build/build_config.h"
 #include "content/child/child_process.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/common/establish_channel_params.h"
 #include "content/common/gpu/gpu_memory_buffer_factory.h"
 #include "content/common/gpu/media/gpu_jpeg_decode_accelerator.h"
 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
 #include "content/common/gpu/media/gpu_video_encode_accelerator.h"
 #include "content/common/gpu/media/media_service.h"
@@ skipping 20 matching lines @@
 #include "ui/ozone/public/ozone_platform.h"
 #endif
 
 #if defined(ENABLE_VULKAN)
 #include "gpu/vulkan/vulkan_surface.h"
 #endif
 
 namespace content {
 namespace {
 
+base::LazyInstance<base::ThreadLocalPointer<GpuChildThread>> g_lazy_tls =
+    LAZY_INSTANCE_INITIALIZER;
+
 static base::LazyInstance<scoped_refptr<ThreadSafeSender> >
     g_thread_safe_sender = LAZY_INSTANCE_INITIALIZER;
 
 bool GpuProcessLogMessageHandler(int severity,
                                  const char* file, int line,
                                  size_t message_start,
                                  const std::string& str) {
   std::string header = str.substr(0, message_start);
   std::string message = str.substr(message_start);
 
@@ skipping 78 matching lines @@
                                            ->GetMessageFilter();
   if (message_filter)
     builder.AddStartupFilter(message_filter);
 #endif
 
   return builder.Build();
 }
 
 }  // namespace
 
+// static
+GpuChildThread* GpuChildThread::current() {
+  return g_lazy_tls.Pointer()->Get();
+}
+
 GpuChildThread::GpuChildThread(
     GpuWatchdogThread* watchdog_thread,
     bool dead_on_arrival,
     const gpu::GPUInfo& gpu_info,
     const DeferredMessages& deferred_messages,
     GpuMemoryBufferFactory* gpu_memory_buffer_factory,
     gpu::SyncPointManager* sync_point_manager)
     : ChildThreadImpl(GetOptions(gpu_memory_buffer_factory)),
       dead_on_arrival_(dead_on_arrival),
       sync_point_manager_(sync_point_manager),
       gpu_info_(gpu_info),
       deferred_messages_(deferred_messages),
       in_browser_process_(false),
       gpu_memory_buffer_factory_(gpu_memory_buffer_factory) {
   watchdog_thread_ = watchdog_thread;
 #if defined(OS_WIN)
   target_services_ = NULL;
 #endif
   g_thread_safe_sender.Get() = thread_safe_sender();
+  g_lazy_tls.Pointer()->Set(this);
 }
 
 GpuChildThread::GpuChildThread(
     const gpu::GpuPreferences& gpu_preferences,
     const InProcessChildThreadParams& params,
     GpuMemoryBufferFactory* gpu_memory_buffer_factory,
     gpu::SyncPointManager* sync_point_manager)
     : ChildThreadImpl(ChildThreadImpl::Options::Builder()
                           .InBrowserProcess(params)
                           .AddStartupFilter(new GpuMemoryBufferMessageFilter(
@@ skipping 14 matching lines @@
 
 #if defined(ENABLE_VULKAN)
   // Temporary Vulkan initialization injection.
   gpu::VulkanSurface::InitializeOneOff();
 #endif
 
   if (!gfx::GLSurface::InitializeOneOff())
     VLOG(1) << "gfx::GLSurface::InitializeOneOff failed";
 
   g_thread_safe_sender.Get() = thread_safe_sender();
+  g_lazy_tls.Pointer()->Set(this);
 }
 
 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);
 }
 
 void GpuChildThread::Init(const base::Time& process_start_time) {
   process_start_time_ = process_start_time;
 
@@ skipping 355 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