Revert "Move mojo edk into mojo/edk"

mojo/edk/system/waiter_list.cc

-// 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/edk/system/waiter_list.h"
-
-#include "base/logging.h"
-#include "mojo/edk/system/handle_signals_state.h"
-#include "mojo/edk/system/waiter.h"
-
-namespace mojo {
-namespace system {
-
-WaiterList::WaiterList() {
-}
-
-WaiterList::~WaiterList() {
-  DCHECK(waiters_.empty());
-}
-
-void WaiterList::AwakeWaitersForStateChange(const HandleSignalsState& state) {
-  for (WaiterInfoList::iterator it = waiters_.begin(); it != waiters_.end();
-       ++it) {
-    if (state.satisfies(it->signals))
-      it->waiter->Awake(MOJO_RESULT_OK, it->context);
-    else if (!state.can_satisfy(it->signals))
-      it->waiter->Awake(MOJO_RESULT_FAILED_PRECONDITION, it->context);
-  }
-}
-
-void WaiterList::CancelAllWaiters() {
-  for (WaiterInfoList::iterator it = waiters_.begin(); it != waiters_.end();
-       ++it) {
-    it->waiter->Awake(MOJO_RESULT_CANCELLED, it->context);
-  }
-  waiters_.clear();
-}
-
-void WaiterList::AddWaiter(Waiter* waiter,
-                           MojoHandleSignals signals,
-                           uint32_t context) {
-  waiters_.push_back(WaiterInfo(waiter, signals, context));
-}
-
-void WaiterList::RemoveWaiter(Waiter* waiter) {
-  // We allow a thread to wait on the same handle multiple times simultaneously,
-  // so we need to scan the entire list and remove all occurrences of |waiter|.
-  for (WaiterInfoList::iterator it = waiters_.begin(); it != waiters_.end();) {
-    WaiterInfoList::iterator maybe_delete = it;
-    ++it;
-    if (maybe_delete->waiter == waiter)
-      waiters_.erase(maybe_delete);
-  }
-}
-
-}  // namespace system
-}  // namespace mojo