Revert "Migrate the IndexedDB backend from Blink to Chromium"

content/browser/indexed_db/indexed_db_transaction_coordinator.cc

Index: content/browser/indexed_db/indexed_db_transaction_coordinator.cc
diff --git a/content/browser/indexed_db/indexed_db_transaction_coordinator.cc b/content/browser/indexed_db/indexed_db_transaction_coordinator.cc
deleted file mode 100644
index 06d6fa0a061f5853f55b594b0359837fcb771ccb..0000000000000000000000000000000000000000
--- a/content/browser/indexed_db/indexed_db_transaction_coordinator.cc
+++ /dev/null
@@ -1,135 +0,0 @@
-// Copyright (c) 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 "content/browser/indexed_db/indexed_db_transaction_coordinator.h"
-
-#include "base/basictypes.h"
-#include "base/logging.h"
-#include "content/browser/indexed_db/indexed_db_transaction.h"
-
-namespace content {
-
-IndexedDBTransactionCoordinator::IndexedDBTransactionCoordinator() {}
-
-IndexedDBTransactionCoordinator::~IndexedDBTransactionCoordinator() {
-  // TODO(jsbell): DCHECK that all queues are empty. http://crbug.com/241821
-}
-
-void IndexedDBTransactionCoordinator::DidCreateTransaction(
-    IndexedDBTransaction* transaction) {
-  DCHECK(transactions_.find(transaction) == transactions_.end());
-  transactions_[transaction] = transaction;
-}
-
-void IndexedDBTransactionCoordinator::DidStartTransaction(
-    IndexedDBTransaction* transaction) {
-  DCHECK(transactions_.find(transaction) != transactions_.end());
-
-  queued_transactions_.insert(transaction);
-  ProcessStartedTransactions();
-}
-
-void IndexedDBTransactionCoordinator::DidFinishTransaction(
-    IndexedDBTransaction* transaction) {
-  DCHECK(transactions_.find(transaction) != transactions_.end());
-
-  if (queued_transactions_.has(transaction)) {
-    DCHECK(started_transactions_.find(transaction) ==
-           started_transactions_.end());
-    queued_transactions_.erase(transaction);
-  } else {
-    if (started_transactions_.find(transaction) != started_transactions_.end())
-      started_transactions_.erase(transaction);
-  }
-  transactions_.erase(transaction);
-
-  ProcessStartedTransactions();
-}
-
-#ifndef NDEBUG
-// Verifies internal consistency while returning whether anything is found.
-bool IndexedDBTransactionCoordinator::IsActive(
-    IndexedDBTransaction* transaction) {
-  bool found = false;
-  if (queued_transactions_.has(transaction))
-    found = true;
-  if (started_transactions_.find(transaction) != started_transactions_.end()) {
-    DCHECK(!found);
-    found = true;
-  }
-  DCHECK_EQ(found, (transactions_.find(transaction) != transactions_.end()));
-  return found;
-}
-#endif
-
-void IndexedDBTransactionCoordinator::ProcessStartedTransactions() {
-  if (queued_transactions_.empty())
-    return;
-
-  DCHECK(started_transactions_.empty() ||
-         (*started_transactions_.begin())->mode() !=
-             indexed_db::TRANSACTION_VERSION_CHANGE);
-
-  list_set<IndexedDBTransaction*>::const_iterator it =
-      queued_transactions_.begin();
-  while (it != queued_transactions_.end()) {
-    IndexedDBTransaction* transaction = *it;
-    ++it;
-    if (CanRunTransaction(transaction)) {
-      queued_transactions_.erase(transaction);
-      started_transactions_.insert(transaction);
-      transaction->Run();
-    }
-  }
-}
-
-static bool DoScopesOverlap(const std::set<int64>& scope1,
-                            const std::set<int64>& scope2) {
-  for (std::set<int64>::const_iterator it = scope1.begin(); it != scope1.end();
-       ++it) {
-    if (scope2.find(*it) != scope2.end())
-      return true;
-  }
-  return false;
-}
-
-bool IndexedDBTransactionCoordinator::CanRunTransaction(
-    IndexedDBTransaction* transaction) {
-  DCHECK(queued_transactions_.has(transaction));
-  switch (transaction->mode()) {
-    case indexed_db::TRANSACTION_VERSION_CHANGE:
-      DCHECK(queued_transactions_.size() == 1);
-      DCHECK(started_transactions_.empty());
-      return true;
-
-    case indexed_db::TRANSACTION_READ_ONLY:
-      return true;
-
-    case indexed_db::TRANSACTION_READ_WRITE:
-      for (std::set<IndexedDBTransaction*>::const_iterator it =
-               started_transactions_.begin();
-           it != started_transactions_.end();
-           ++it) {
-        IndexedDBTransaction* other = *it;
-        if (other->mode() == indexed_db::TRANSACTION_READ_WRITE &&
-            DoScopesOverlap(transaction->scope(), other->scope()))
-          return false;
-      }
-      for (list_set<IndexedDBTransaction*>::const_iterator it =
-               queued_transactions_.begin();
-           *it != transaction;
-           ++it) {
-        DCHECK(it != queued_transactions_.end());
-        IndexedDBTransaction* other = *it;
-        if (other->mode() == indexed_db::TRANSACTION_READ_WRITE &&
-            DoScopesOverlap(transaction->scope(), other->scope()))
-          return false;
-      }
-      return true;
-  }
-  NOTREACHED();
-  return false;
-}
-
-}  // namespace content