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

android_webview/browser/aw_browser_terminator.cc

-// Copyright 2016 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 "android_webview/browser/aw_browser_terminator.h"
-
-#include <unistd.h>
-
-#include "android_webview/common/aw_descriptors.h"
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/stl_util.h"
-#include "base/sync_socket.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"
-
-namespace android_webview {
-
-AwBrowserTerminator::AwBrowserTerminator() {}
-
-AwBrowserTerminator::~AwBrowserTerminator() {}
-
-void AwBrowserTerminator::OnChildStart(int child_process_id,
-                                       content::FileDescriptorInfo* mappings) {
-  DCHECK_CURRENTLY_ON(content::BrowserThread::PROCESS_LAUNCHER);
-
-  base::AutoLock auto_lock(child_process_id_to_pipe_lock_);
-  DCHECK(!ContainsKey(child_process_id_to_pipe_, child_process_id));
-
-  std::unique_ptr<base::SyncSocket> local_pipe(new base::SyncSocket());
-  std::unique_ptr<base::SyncSocket> child_pipe(new base::SyncSocket());
-  if (base::SyncSocket::CreatePair(local_pipe.get(), child_pipe.get())) {
-    child_process_id_to_pipe_[child_process_id] = std::move(local_pipe);
-    mappings->Transfer(kAndroidWebViewCrashSignalDescriptor,
-                       base::ScopedFD(dup(child_pipe->handle())));
-  }
-}
-
-void AwBrowserTerminator::OnChildExit(
-    int child_process_id,
-    base::ProcessHandle pid,
-    content::ProcessType process_type,
-    base::TerminationStatus termination_status,
-    base::android::ApplicationState app_state) {
-  std::unique_ptr<base::SyncSocket> pipe;
-
-  {
-    base::AutoLock auto_lock(child_process_id_to_pipe_lock_);
-    const auto& iter = child_process_id_to_pipe_.find(child_process_id);
-    if (iter == child_process_id_to_pipe_.end()) {
-      // We might get a NOTIFICATION_RENDERER_PROCESS_TERMINATED and a
-      // NOTIFICATION_RENDERER_PROCESS_CLOSED.
-      return;
-    }
-    pipe = std::move(iter->second);
-    child_process_id_to_pipe_.erase(iter);
-  }
-  DCHECK(pipe->handle() != base::SyncSocket::kInvalidHandle);
-
-  if (termination_status == base::TERMINATION_STATUS_NORMAL_TERMINATION)
-    return;
-  if (pipe->Peek() >= sizeof(int)) {
-    int exit_code;
-    pipe->Receive(&exit_code, sizeof(exit_code));
-    LOG(FATAL) << "Renderer process crash detected (code " << exit_code
-               << "). Terminating browser.";
-  } else {
-    // The child process hasn't written anything into the pipe. This implies
-    // that it was terminated via SIGKILL by the low memory killer, and thus we
-    // need to perform a clean exit.
-    exit(0);
-  }
-}
-
-}  // namespace breakpad