Revert "Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton."

components/crash/content/browser/crash_dump_observer_android.cc

-// Copyright 2015 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 "components/crash/content/browser/crash_dump_observer_android.h"
-
-#include <unistd.h>
-
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/stl_util.h"
-#include "base/threading/sequenced_worker_pool.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/child_process_data.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/browser/notification_types.h"
-#include "content/public/browser/render_process_host.h"
-
-using content::BrowserThread;
-
-namespace breakpad {
-
-// static
-CrashDumpObserver* CrashDumpObserver::GetInstance() {
-  return base::Singleton<CrashDumpObserver>::get();
-}
-
-CrashDumpObserver::CrashDumpObserver() {
-  notification_registrar_.Add(this,
-                              content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
-                              content::NotificationService::AllSources());
-  notification_registrar_.Add(this,
-                              content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
-                              content::NotificationService::AllSources());
-}
-
-CrashDumpObserver::~CrashDumpObserver() {}
-
-void CrashDumpObserver::OnChildExitOnBlockingPool(
-    Client* client,
-    int child_process_id,
-    base::ProcessHandle pid,
-    content::ProcessType process_type,
-    base::TerminationStatus termination_status,
-    base::android::ApplicationState app_state) {
-  base::AutoLock auto_lock(registered_clients_lock_);
-  // Only call Client::OnChildExit if we haven't been removed in the
-  // interim.
-  if (base::ContainsValue(registered_clients_, client)) {
-    client->OnChildExit(child_process_id, pid, process_type, termination_status,
-                        app_state);
-  }
-}
-
-void CrashDumpObserver::OnChildExit(int child_process_id,
-                                    base::ProcessHandle pid,
-                                    content::ProcessType process_type,
-                                    base::TerminationStatus termination_status,
-                                    base::android::ApplicationState app_state) {
-  base::AutoLock auto_lock(registered_clients_lock_);
-  base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool();
-  base::SequencedWorkerPool::SequenceToken token = pool->GetSequenceToken();
-
-  for (auto& client : registered_clients_) {
-    pool->PostSequencedWorkerTask(
-        token, FROM_HERE,
-        base::Bind(&CrashDumpObserver::OnChildExitOnBlockingPool,
-                   base::Unretained(this), client, child_process_id, pid,
-                   process_type, termination_status, app_state));
-  }
-}
-
-void CrashDumpObserver::RegisterClient(Client* client) {
-  base::AutoLock auto_lock(registered_clients_lock_);
-  if (std::find(std::begin(registered_clients_), std::end(registered_clients_),
-                client) != std::end(registered_clients_)) {
-    return;
-  }
-  registered_clients_.push_back(client);
-}
-
-void CrashDumpObserver::UnregisterClient(Client* client) {
-  base::AutoLock auto_lock(registered_clients_lock_);
-  registered_clients_.remove(client);
-}
-
-void CrashDumpObserver::BrowserChildProcessStarted(
-    int child_process_id,
-    content::FileDescriptorInfo* mappings) {
-  base::AutoLock auto_lock(registered_clients_lock_);
-  for (auto& client : registered_clients_) {
-    client->OnChildStart(child_process_id, mappings);
-  }
-}
-
-void CrashDumpObserver::BrowserChildProcessHostDisconnected(
-    const content::ChildProcessData& data) {
-  OnChildExit(data.id, data.handle,
-              static_cast<content::ProcessType>(data.process_type),
-              base::TERMINATION_STATUS_MAX_ENUM,
-              base::android::APPLICATION_STATE_UNKNOWN);
-}
-
-void CrashDumpObserver::BrowserChildProcessCrashed(
-    const content::ChildProcessData& data,
-    int exit_code) {
-  OnChildExit(data.id, data.handle,
-              static_cast<content::ProcessType>(data.process_type),
-              base::TERMINATION_STATUS_ABNORMAL_TERMINATION,
-              base::android::APPLICATION_STATE_UNKNOWN);
-}
-
-void CrashDumpObserver::Observe(int type,
-                                const content::NotificationSource& source,
-                                const content::NotificationDetails& details) {
-  content::RenderProcessHost* rph =
-      content::Source<content::RenderProcessHost>(source).ptr();
-  base::TerminationStatus term_status = base::TERMINATION_STATUS_MAX_ENUM;
-  base::android::ApplicationState app_state =
-      base::android::APPLICATION_STATE_UNKNOWN;
-  switch (type) {
-    case content::NOTIFICATION_RENDERER_PROCESS_TERMINATED: {
-      // NOTIFICATION_RENDERER_PROCESS_TERMINATED is sent when the renderer
-      // process is cleanly shutdown. However, we still need to close the
-      // minidump_fd we kept open.
-      term_status = base::TERMINATION_STATUS_NORMAL_TERMINATION;
-      break;
-    }
-    case content::NOTIFICATION_RENDERER_PROCESS_CLOSED: {
-      // We do not care about android fast shutdowns as it is a known case where
-      // the renderer is intentionally killed when we are done with it.
-      if (rph->FastShutdownStarted()) {
-        break;
-      }
-      content::RenderProcessHost::RendererClosedDetails* process_details =
-          content::Details<content::RenderProcessHost::RendererClosedDetails>(
-              details)
-              .ptr();
-      term_status = process_details->status;
-      app_state = base::android::ApplicationStatusListener::GetState();
-      break;
-    }
-    default:
-      NOTREACHED();
-      return;
-  }
-
-  OnChildExit(rph->GetID(), rph->GetHandle(), content::PROCESS_TYPE_RENDERER,
-              term_status, app_state);
-}
-
-}  // namespace breakpad