Moved common parts of ChildProcessHost into chrome/common and created a Brows...

chrome/browser/child_process_host.cc

Index: chrome/browser/child_process_host.cc
===================================================================
--- chrome/browser/child_process_host.cc	(revision 51385)
+++ chrome/browser/child_process_host.cc	(working copy)
@@ -1,328 +0,0 @@
-// Copyright (c) 2010 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 "chrome/browser/child_process_host.h"
-
-#include "base/command_line.h"
-#include "base/compiler_specific.h"
-#include "base/file_path.h"
-#include "base/histogram.h"
-#include "base/logging.h"
-#include "base/path_service.h"
-#include "base/process_util.h"
-#include "base/singleton.h"
-#include "base/stl_util-inl.h"
-#include "base/string_util.h"
-#include "base/waitable_event.h"
-#include "chrome/browser/chrome_thread.h"
-#include "chrome/common/chrome_constants.h"
-#include "chrome/common/chrome_paths_internal.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/env_vars.h"
-#include "chrome/common/notification_service.h"
-#include "chrome/common/notification_type.h"
-#include "chrome/common/plugin_messages.h"
-#include "chrome/common/process_watcher.h"
-#include "chrome/common/result_codes.h"
-#include "chrome/installer/util/google_update_settings.h"
-
-#if defined(OS_LINUX)
-#include "base/linux_util.h"
-#endif  // OS_LINUX
-
-#if defined(OS_POSIX)
-// This is defined in chrome/browser/google_update_settings_posix.cc.  It's the
-// static string containing the user's unique GUID.  We send this in the crash
-// report.
-namespace google_update {
-extern std::string posix_guid;
-}  // namespace google_update
-#endif  // OS_POSIX
-
-
-namespace {
-
-typedef std::list<ChildProcessHost*> ChildProcessList;
-
-// The NotificationTask is used to notify about plugin process connection/
-// disconnection. It is needed because the notifications in the
-// NotificationService must happen in the main thread.
-class ChildNotificationTask : public Task {
- public:
-  ChildNotificationTask(
-      NotificationType notification_type, ChildProcessInfo* info)
-      : notification_type_(notification_type), info_(*info) { }
-
-  virtual void Run() {
-    NotificationService::current()->
-        Notify(notification_type_, NotificationService::AllSources(),
-               Details<ChildProcessInfo>(&info_));
-  }
-
- private:
-  NotificationType notification_type_;
-  ChildProcessInfo info_;
-};
-
-}  // namespace
-
-
-ChildProcessHost::ChildProcessHost(
-    ProcessType type, ResourceDispatcherHost* resource_dispatcher_host)
-    : Receiver(type, -1),
-      ALLOW_THIS_IN_INITIALIZER_LIST(listener_(this)),
-      resource_dispatcher_host_(resource_dispatcher_host),
-      opening_channel_(false) {
-  Singleton<ChildProcessList>::get()->push_back(this);
-}
-
-
-ChildProcessHost::~ChildProcessHost() {
-  Singleton<ChildProcessList>::get()->remove(this);
-
-  if (resource_dispatcher_host_)
-    resource_dispatcher_host_->CancelRequestsForProcess(id());
-}
-
-// static
-FilePath ChildProcessHost::GetChildPath(bool allow_self) {
-  FilePath child_path;
-
-  child_path = CommandLine::ForCurrentProcess()->GetSwitchValuePath(
-      switches::kBrowserSubprocessPath);
-  if (!child_path.empty())
-    return child_path;
-
-#if defined(OS_MACOSX)
-  // On the Mac, the child executable lives at a predefined location within
-  // the app bundle's versioned directory.
-  return chrome::GetVersionedDirectory().
-      Append(chrome::kHelperProcessExecutablePath);
-#endif
-
-#if defined(OS_LINUX)
-  // Use /proc/self/exe rather than our known binary path so updates
-  // can't swap out the binary from underneath us.
-  if (allow_self)
-    return FilePath("/proc/self/exe");
-#endif
-
-  // On most platforms, the child executable is the same as the current
-  // executable.
-  PathService::Get(base::FILE_EXE, &child_path);
-  return child_path;
-}
-
-// static
-void ChildProcessHost::SetCrashReporterCommandLine(CommandLine* command_line) {
-#if defined(USE_LINUX_BREAKPAD)
-  const bool unattended = (getenv(env_vars::kHeadless) != NULL);
-  if (unattended || GoogleUpdateSettings::GetCollectStatsConsent()) {
-    command_line->AppendSwitchWithValue(switches::kEnableCrashReporter,
-                                        ASCIIToWide(google_update::posix_guid +
-                                                    "," +
-                                                    base::GetLinuxDistro()));
-  }
-#elif defined(OS_MACOSX)
-  if (GoogleUpdateSettings::GetCollectStatsConsent())
-    command_line->AppendSwitchWithValue(switches::kEnableCrashReporter,
-                                        ASCIIToWide(google_update::posix_guid));
-#endif  // OS_MACOSX
-}
-
-// static
-void ChildProcessHost::TerminateAll() {
-  // Make a copy since the ChildProcessHost dtor mutates the original list.
-  ChildProcessList copy = *(Singleton<ChildProcessList>::get());
-  STLDeleteElements(&copy);
-}
-
-void ChildProcessHost::Launch(
-#if defined(OS_WIN)
-    const FilePath& exposed_dir,
-#elif defined(OS_POSIX)
-    bool use_zygote,
-    const base::environment_vector& environ,
-#endif
-    CommandLine* cmd_line) {
-  child_process_.reset(new ChildProcessLauncher(
-#if defined(OS_WIN)
-      exposed_dir,
-#elif defined(OS_POSIX)
-      use_zygote,
-      environ,
-      channel_->GetClientFileDescriptor(),
-#endif
-      cmd_line,
-      &listener_));
-}
-
-bool ChildProcessHost::CreateChannel() {
-  channel_id_ = GenerateRandomChannelID(this);
-  channel_.reset(new IPC::Channel(
-      channel_id_, IPC::Channel::MODE_SERVER, &listener_));
-  if (!channel_->Connect())
-    return false;
-
-  opening_channel_ = true;
-
-  return true;
-}
-
-void ChildProcessHost::InstanceCreated() {
-  Notify(NotificationType::CHILD_INSTANCE_CREATED);
-}
-
-bool ChildProcessHost::Send(IPC::Message* msg) {
-  if (!channel_.get()) {
-    delete msg;
-    return false;
-  }
-  return channel_->Send(msg);
-}
-
-void ChildProcessHost::Notify(NotificationType type) {
-  ChromeThread::PostTask(
-      ChromeThread::UI, FROM_HERE, new ChildNotificationTask(type, this));
-}
-
-bool ChildProcessHost::DidChildCrash() {
-  return child_process_->DidProcessCrash();
-}
-
-void ChildProcessHost::OnChildDied() {
-  if (handle() != base::kNullProcessHandle) {
-    bool did_crash = DidChildCrash();
-    if (did_crash) {
-      OnProcessCrashed();
-      // Report that this child process crashed.
-      Notify(NotificationType::CHILD_PROCESS_CRASHED);
-      UMA_HISTOGRAM_COUNTS("ChildProcess.Crashes", this->type());
-    }
-    // Notify in the main loop of the disconnection.
-    Notify(NotificationType::CHILD_PROCESS_HOST_DISCONNECTED);
-  }
-
-  delete this;
-}
-
-ChildProcessHost::ListenerHook::ListenerHook(ChildProcessHost* host)
-    : host_(host) {
-}
-
-void ChildProcessHost::ListenerHook::OnMessageReceived(
-    const IPC::Message& msg) {
-#ifdef IPC_MESSAGE_LOG_ENABLED
-  IPC::Logging* logger = IPC::Logging::current();
-  if (msg.type() == IPC_LOGGING_ID) {
-    logger->OnReceivedLoggingMessage(msg);
-    return;
-  }
-
-  if (logger->Enabled())
-    logger->OnPreDispatchMessage(msg);
-#endif
-
-  bool msg_is_ok = true;
-  bool handled = false;
-
-  if (host_->resource_dispatcher_host_) {
-    handled = host_->resource_dispatcher_host_->OnMessageReceived(
-        msg, host_, &msg_is_ok);
-  }
-
-  if (!handled) {
-    if (msg.type() == PluginProcessHostMsg_ShutdownRequest::ID) {
-      // Must remove the process from the list now, in case it gets used for a
-      // new instance before our watcher tells us that the process terminated.
-      Singleton<ChildProcessList>::get()->remove(host_);
-      if (host_->CanShutdown())
-        host_->Send(new PluginProcessMsg_Shutdown());
-    } else {
-      host_->OnMessageReceived(msg);
-    }
-  }
-
-  if (!msg_is_ok)
-    base::KillProcess(host_->handle(), ResultCodes::KILLED_BAD_MESSAGE, false);
-
-#ifdef IPC_MESSAGE_LOG_ENABLED
-  if (logger->Enabled())
-    logger->OnPostDispatchMessage(msg, host_->channel_id_);
-#endif
-}
-
-void ChildProcessHost::ListenerHook::OnChannelConnected(int32 peer_pid) {
-  host_->opening_channel_ = false;
-  host_->OnChannelConnected(peer_pid);
-
-#if defined(IPC_MESSAGE_LOG_ENABLED)
-  bool enabled = IPC::Logging::current()->Enabled();
-  host_->Send(new PluginProcessMsg_SetIPCLoggingEnabled(enabled));
-#endif
-
-  host_->Send(new PluginProcessMsg_AskBeforeShutdown());
-
-  // Notify in the main loop of the connection.
-  host_->Notify(NotificationType::CHILD_PROCESS_HOST_CONNECTED);
-}
-
-void ChildProcessHost::ListenerHook::OnChannelError() {
-  host_->opening_channel_ = false;
-  host_->OnChannelError();
-
-  // This will delete host_, which will also destroy this!
-  host_->OnChildDied();
-}
-
-void ChildProcessHost::ListenerHook::OnProcessLaunched() {
-  if (!host_->child_process_->GetHandle()) {
-    delete this;
-    return;
-  }
-
-  host_->set_handle(host_->child_process_->GetHandle());
-  host_->OnProcessLaunched();
-}
-
-
-ChildProcessHost::Iterator::Iterator()
-    : all_(true), type_(UNKNOWN_PROCESS) {
-  DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO)) <<
-          "ChildProcessInfo::Iterator must be used on the IO thread.";
-  iterator_ = Singleton<ChildProcessList>::get()->begin();
-}
-
-ChildProcessHost::Iterator::Iterator(ProcessType type)
-    : all_(false), type_(type) {
-  DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO)) <<
-          "ChildProcessInfo::Iterator must be used on the IO thread.";
-  iterator_ = Singleton<ChildProcessList>::get()->begin();
-  if (!Done() && (*iterator_)->type() != type_)
-    ++(*this);
-}
-
-ChildProcessHost* ChildProcessHost::Iterator::operator++() {
-  do {
-    ++iterator_;
-    if (Done())
-      break;
-
-    if (!all_ && (*iterator_)->type() != type_)
-      continue;
-
-    return *iterator_;
-  } while (true);
-
-  return NULL;
-}
-
-bool ChildProcessHost::Iterator::Done() {
-  return iterator_ == Singleton<ChildProcessList>::get()->end();
-}
-
-void ChildProcessHost::ForceShutdown() {
-  Singleton<ChildProcessList>::get()->remove(this);
-  Send(new PluginProcessMsg_Shutdown());
-}