Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton.

components/crash/content/browser/crash_micro_dump_manager_android.cc

Index: components/crash/content/browser/crash_micro_dump_manager_android.cc
diff --git a/components/crash/content/browser/crash_micro_dump_manager_android.cc b/components/crash/content/browser/crash_micro_dump_manager_android.cc
deleted file mode 100644
index cfb4b1c2d758faf9049a7da33ddd9f20265483a1..0000000000000000000000000000000000000000
--- a/components/crash/content/browser/crash_micro_dump_manager_android.cc
+++ /dev/null
@@ -1,129 +0,0 @@
-// 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_micro_dump_manager_android.h"
-
-#include <unistd.h>
-
-#include "base/bind.h"
-#include "base/logging.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
-CrashMicroDumpManager* CrashMicroDumpManager::GetInstance() {
-  return base::Singleton<CrashMicroDumpManager>::get();
-}
-
-CrashMicroDumpManager::CrashMicroDumpManager() : weak_factory_(this) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-
-  notification_registrar_.Add(this,
-                              content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
-                              content::NotificationService::AllSources());
-  notification_registrar_.Add(this,
-                              content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
-                              content::NotificationService::AllSources());
-}
-
-CrashMicroDumpManager::~CrashMicroDumpManager() {
-  base::AutoLock auto_lock(child_process_id_to_pipe_lock_);
-  child_process_id_to_pipe_.clear();
-}
-
-base::ScopedFD CrashMicroDumpManager::CreateCrashInfoChannel(
-    int child_process_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::PROCESS_LAUNCHER);
-  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()))
-    return base::ScopedFD();
-  {
-    base::AutoLock auto_lock(child_process_id_to_pipe_lock_);
-    DCHECK(!ContainsKey(child_process_id_to_pipe_, child_process_id));
-    child_process_id_to_pipe_[child_process_id] = std::move(local_pipe);
-  }
-  return base::ScopedFD(dup(child_pipe->handle()));
-}
-
-void CrashMicroDumpManager::HandleChildTerminationOnFileThread(
-    int child_process_id,
-    base::TerminationStatus termination_status) {
-  DCHECK_CURRENTLY_ON(BrowserThread::FILE);
-
-  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);
-  }
-}
-
-void CrashMicroDumpManager::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  content::RenderProcessHost* rph =
-      content::Source<content::RenderProcessHost>(source).ptr();
-  // In case of a normal termination we just need to close the pipe_fd we kept
-  // open.
-  base::TerminationStatus termination_status =
-      base::TERMINATION_STATUS_NORMAL_TERMINATION;
-  switch (type) {
-    case content::NOTIFICATION_RENDERER_PROCESS_TERMINATED: {
-      // NOTIFICATION_RENDERER_PROCESS_TERMINATED is sent when the renderer
-      // process is cleanly shutdown.
-      break;
-    }
-    case content::NOTIFICATION_RENDERER_PROCESS_CLOSED: {
-      // Android fast shutdowns is a known case where the renderer is
-      // intentionally killed when we are done with it.
-      if (!rph->FastShutdownStarted()) {
-        content::RenderProcessHost::RendererClosedDetails* process_details =
-            content::Details<content::RenderProcessHost::RendererClosedDetails>(
-                details).ptr();
-        termination_status = process_details->status;
-      }
-      break;
-    }
-    default:
-      NOTREACHED();
-      return;
-  }
-  BrowserThread::PostTask(
-      BrowserThread::FILE, FROM_HERE,
-      base::Bind(&CrashMicroDumpManager::HandleChildTerminationOnFileThread,
-                 weak_factory_.GetWeakPtr(), rph->GetID(),
-                 termination_status));
-}
-
-}  // namespace breakpad