discardable_memory: Using mojo IPC to replace Chrome IPC

content/browser/browser_main_loop.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/browser_main_loop.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 13 matching lines @@
 #include "base/metrics/user_metrics.h"
 #include "base/pending_task.h"
 #include "base/power_monitor/power_monitor.h"
 #include "base/power_monitor/power_monitor_device_source.h"
 #include "base/process/process_metrics.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/threading/sequenced_worker_pool.h"

[dcheng, 2016/11/28 18:26:54]

Please try to separate rebases from addressing review comments, this is already
a pretty large CL.

 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/timer/hi_res_timer_manager.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "components/discardable_memory/service/discardable_shared_memory_manager.h"
 #include "components/tracing/browser/trace_config_file.h"
 #include "components/tracing/common/process_metrics_memory_dump_provider.h"
 #include "components/tracing/common/trace_to_console.h"
@@ skipping 582 matching lines @@
   {
     base::SetRecordActionTaskRunner(
         BrowserThread::GetTaskRunnerForThread(BrowserThread::UI));
   }
 
 #if defined(OS_WIN)
   if (base::win::GetVersion() >= base::win::VERSION_WIN8)
     screen_orientation_delegate_.reset(new ScreenOrientationDelegateWin());
 #endif
 
+  auto* discardable_shared_memory_manager =
+      discardable_memory::DiscardableSharedMemoryManager::CreateInstance();
+
   // TODO(boliu): kSingleProcess check is a temporary workaround for
   // in-process Android WebView. crbug.com/503724 tracks proper fix.
   if (!parsed_command_line_.HasSwitch(switches::kSingleProcess)) {
     base::DiscardableMemoryAllocator::SetInstance(
-        discardable_memory::DiscardableSharedMemoryManager::current());
+        discardable_shared_memory_manager);
   }
 
   if (parts_)
     parts_->PostMainMessageLoopStart();
 
   // Start startup tracing through TracingController's interface. TraceLog has
   // been enabled in content_main_runner where threads are not available. Now We
   // need to start tracing for all other tracing agents, which require threads.
   if (parsed_command_line_.HasSwitch(switches::kTraceStartup)) {
     base::trace_event::TraceConfig trace_config(
@@ skipping 974 matching lines @@
     scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner =
         audio_thread_->task_runner();
     audio_manager_ = media::AudioManager::Create(std::move(audio_task_runner),
                                                  std::move(worker_task_runner),
                                                  MediaInternals::GetInstance());
   }
   CHECK(audio_manager_);
 }
 
 }  // namespace content