Revert of Straightens outs DEPS in mojo/common

mojo/message_pump/message_pump_mojo.cc

Index: mojo/message_pump/message_pump_mojo.cc
diff --git a/mojo/message_pump/message_pump_mojo.cc b/mojo/message_pump/message_pump_mojo.cc
deleted file mode 100644
index a24349be3d721dcc418d50abd2645d959f593fbb..0000000000000000000000000000000000000000
--- a/mojo/message_pump/message_pump_mojo.cc
+++ /dev/null
@@ -1,295 +0,0 @@
-// Copyright 2013 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 "mojo/message_pump/message_pump_mojo.h"
-
-#include <algorithm>
-#include <vector>
-
-#include "base/debug/alias.h"
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/threading/thread_local.h"
-#include "base/time/time.h"
-#include "mojo/message_pump/message_pump_mojo_handler.h"
-#include "mojo/message_pump/time_helper.h"
-
-namespace mojo {
-namespace common {
-namespace {
-
-base::LazyInstance<base::ThreadLocalPointer<MessagePumpMojo> >::Leaky
-    g_tls_current_pump = LAZY_INSTANCE_INITIALIZER;
-
-MojoDeadline TimeTicksToMojoDeadline(base::TimeTicks time_ticks,
-                                     base::TimeTicks now) {
-  // The is_null() check matches that of HandleWatcher as well as how
-  // |delayed_work_time| is used.
-  if (time_ticks.is_null())
-    return MOJO_DEADLINE_INDEFINITE;
-  const int64_t delta = (time_ticks - now).InMicroseconds();
-  return delta < 0 ? static_cast<MojoDeadline>(0) :
-                     static_cast<MojoDeadline>(delta);
-}
-
-}  // namespace
-
-// State needed for one iteration of WaitMany. The first handle and flags
-// corresponds to that of the control pipe.
-struct MessagePumpMojo::WaitState {
-  std::vector<Handle> handles;
-  std::vector<MojoHandleSignals> wait_signals;
-};
-
-struct MessagePumpMojo::RunState {
-  RunState() : should_quit(false) {
-    CreateMessagePipe(NULL, &read_handle, &write_handle);
-  }
-
-  base::TimeTicks delayed_work_time;
-
-  // Used to wake up WaitForWork().
-  ScopedMessagePipeHandle read_handle;
-  ScopedMessagePipeHandle write_handle;
-
-  bool should_quit;
-};
-
-MessagePumpMojo::MessagePumpMojo() : run_state_(NULL), next_handler_id_(0) {
-  DCHECK(!current())
-      << "There is already a MessagePumpMojo instance on this thread.";
-  g_tls_current_pump.Pointer()->Set(this);
-}
-
-MessagePumpMojo::~MessagePumpMojo() {
-  DCHECK_EQ(this, current());
-  g_tls_current_pump.Pointer()->Set(NULL);
-}
-
-// static
-scoped_ptr<base::MessagePump> MessagePumpMojo::Create() {
-  return scoped_ptr<MessagePump>(new MessagePumpMojo());
-}
-
-// static
-MessagePumpMojo* MessagePumpMojo::current() {
-  return g_tls_current_pump.Pointer()->Get();
-}
-
-void MessagePumpMojo::AddHandler(MessagePumpMojoHandler* handler,
-                                 const Handle& handle,
-                                 MojoHandleSignals wait_signals,
-                                 base::TimeTicks deadline) {
-  CHECK(handler);
-  DCHECK(handle.is_valid());
-  // Assume it's an error if someone tries to reregister an existing handle.
-  CHECK_EQ(0u, handlers_.count(handle));
-  Handler handler_data;
-  handler_data.handler = handler;
-  handler_data.wait_signals = wait_signals;
-  handler_data.deadline = deadline;
-  handler_data.id = next_handler_id_++;
-  handlers_[handle] = handler_data;
-}
-
-void MessagePumpMojo::RemoveHandler(const Handle& handle) {
-  handlers_.erase(handle);
-}
-
-void MessagePumpMojo::AddObserver(Observer* observer) {
-  observers_.AddObserver(observer);
-}
-
-void MessagePumpMojo::RemoveObserver(Observer* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-void MessagePumpMojo::Run(Delegate* delegate) {
-  RunState run_state;
-  // TODO: better deal with error handling.
-  CHECK(run_state.read_handle.is_valid());
-  CHECK(run_state.write_handle.is_valid());
-  RunState* old_state = NULL;
-  {
-    base::AutoLock auto_lock(run_state_lock_);
-    old_state = run_state_;
-    run_state_ = &run_state;
-  }
-  DoRunLoop(&run_state, delegate);
-  {
-    base::AutoLock auto_lock(run_state_lock_);
-    run_state_ = old_state;
-  }
-}
-
-void MessagePumpMojo::Quit() {
-  base::AutoLock auto_lock(run_state_lock_);
-  if (run_state_)
-    run_state_->should_quit = true;
-}
-
-void MessagePumpMojo::ScheduleWork() {
-  base::AutoLock auto_lock(run_state_lock_);
-  if (run_state_)
-    SignalControlPipe(*run_state_);
-}
-
-void MessagePumpMojo::ScheduleDelayedWork(
-    const base::TimeTicks& delayed_work_time) {
-  base::AutoLock auto_lock(run_state_lock_);
-  if (!run_state_)
-    return;
-  run_state_->delayed_work_time = delayed_work_time;
-}
-
-void MessagePumpMojo::DoRunLoop(RunState* run_state, Delegate* delegate) {
-  bool more_work_is_plausible = true;
-  for (;;) {
-    const bool block = !more_work_is_plausible;
-    more_work_is_plausible = DoInternalWork(*run_state, block);
-
-    if (run_state->should_quit)
-      break;
-
-    more_work_is_plausible |= delegate->DoWork();
-    if (run_state->should_quit)
-      break;
-
-    more_work_is_plausible |= delegate->DoDelayedWork(
-        &run_state->delayed_work_time);
-    if (run_state->should_quit)
-      break;
-
-    if (more_work_is_plausible)
-      continue;
-
-    more_work_is_plausible = delegate->DoIdleWork();
-    if (run_state->should_quit)
-      break;
-  }
-}
-
-bool MessagePumpMojo::DoInternalWork(const RunState& run_state, bool block) {
-  const MojoDeadline deadline = block ? GetDeadlineForWait(run_state) : 0;
-  const WaitState wait_state = GetWaitState(run_state);
-
-  const WaitManyResult wait_many_result =
-      WaitMany(wait_state.handles, wait_state.wait_signals, deadline, nullptr);
-  const MojoResult result = wait_many_result.result;
-  bool did_work = true;
-  if (result == MOJO_RESULT_OK) {
-    if (wait_many_result.index == 0) {
-      // Control pipe was written to.
-      ReadMessageRaw(run_state.read_handle.get(), NULL, NULL, NULL, NULL,
-                     MOJO_READ_MESSAGE_FLAG_MAY_DISCARD);
-    } else {
-      DCHECK(handlers_.find(wait_state.handles[wait_many_result.index]) !=
-             handlers_.end());
-      WillSignalHandler();
-      handlers_[wait_state.handles[wait_many_result.index]]
-          .handler->OnHandleReady(wait_state.handles[wait_many_result.index]);
-      DidSignalHandler();
-    }
-  } else {
-    switch (result) {
-      case MOJO_RESULT_CANCELLED:
-      case MOJO_RESULT_FAILED_PRECONDITION:
-        RemoveInvalidHandle(wait_state, result, wait_many_result.index);
-        break;
-      case MOJO_RESULT_DEADLINE_EXCEEDED:
-        did_work = false;
-        break;
-      default:
-        base::debug::Alias(&result);
-        // Unexpected result is likely fatal, crash so we can determine cause.
-        CHECK(false);
-    }
-  }
-
-  // Notify and remove any handlers whose time has expired. Make a copy in case
-  // someone tries to add/remove new handlers from notification.
-  const HandleToHandler cloned_handlers(handlers_);
-  const base::TimeTicks now(internal::NowTicks());
-  for (HandleToHandler::const_iterator i = cloned_handlers.begin();
-       i != cloned_handlers.end(); ++i) {
-    // Since we're iterating over a clone of the handlers, verify the handler is
-    // still valid before notifying.
-    if (!i->second.deadline.is_null() && i->second.deadline < now &&
-        handlers_.find(i->first) != handlers_.end() &&
-        handlers_[i->first].id == i->second.id) {
-      WillSignalHandler();
-      i->second.handler->OnHandleError(i->first, MOJO_RESULT_DEADLINE_EXCEEDED);
-      DidSignalHandler();
-      handlers_.erase(i->first);
-      did_work = true;
-    }
-  }
-  return did_work;
-}
-
-void MessagePumpMojo::RemoveInvalidHandle(const WaitState& wait_state,
-                                          MojoResult result,
-                                          uint32_t index) {
-  // TODO(sky): deal with control pipe going bad.
-  CHECK(result == MOJO_RESULT_FAILED_PRECONDITION ||
-        result == MOJO_RESULT_CANCELLED);
-  CHECK_NE(index, 0u);  // Indicates the control pipe went bad.
-
-  // Remove the handle first, this way if OnHandleError() tries to remove the
-  // handle our iterator isn't invalidated.
-  CHECK(handlers_.find(wait_state.handles[index]) != handlers_.end());
-  MessagePumpMojoHandler* handler =
-      handlers_[wait_state.handles[index]].handler;
-  handlers_.erase(wait_state.handles[index]);
-  WillSignalHandler();
-  handler->OnHandleError(wait_state.handles[index], result);
-  DidSignalHandler();
-}
-
-void MessagePumpMojo::SignalControlPipe(const RunState& run_state) {
-  const MojoResult result =
-      WriteMessageRaw(run_state.write_handle.get(), NULL, 0, NULL, 0,
-                      MOJO_WRITE_MESSAGE_FLAG_NONE);
-  // If we can't write we likely won't wake up the thread and there is a strong
-  // chance we'll deadlock.
-  CHECK_EQ(MOJO_RESULT_OK, result);
-}
-
-MessagePumpMojo::WaitState MessagePumpMojo::GetWaitState(
-    const RunState& run_state) const {
-  WaitState wait_state;
-  wait_state.handles.push_back(run_state.read_handle.get());
-  wait_state.wait_signals.push_back(MOJO_HANDLE_SIGNAL_READABLE);
-
-  for (HandleToHandler::const_iterator i = handlers_.begin();
-       i != handlers_.end(); ++i) {
-    wait_state.handles.push_back(i->first);
-    wait_state.wait_signals.push_back(i->second.wait_signals);
-  }
-  return wait_state;
-}
-
-MojoDeadline MessagePumpMojo::GetDeadlineForWait(
-    const RunState& run_state) const {
-  const base::TimeTicks now(internal::NowTicks());
-  MojoDeadline deadline = TimeTicksToMojoDeadline(run_state.delayed_work_time,
-                                                  now);
-  for (HandleToHandler::const_iterator i = handlers_.begin();
-       i != handlers_.end(); ++i) {
-    deadline = std::min(
-        TimeTicksToMojoDeadline(i->second.deadline, now), deadline);
-  }
-  return deadline;
-}
-
-void MessagePumpMojo::WillSignalHandler() {
-  FOR_EACH_OBSERVER(Observer, observers_, WillSignalHandler());
-}
-
-void MessagePumpMojo::DidSignalHandler() {
-  FOR_EACH_OBSERVER(Observer, observers_, DidSignalHandler());
-}
-
-}  // namespace common
-}  // namespace mojo