Add an IO thread index bitmap to disk cache.

net/disk_cache/in_flight_backend_io.cc

 // Copyright (c) 2012 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 "net/disk_cache/in_flight_backend_io.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 208 matching lines @@
 }
 
 base::TimeDelta BackendIO::ElapsedTime() const {
   return base::TimeTicks::Now() - start_time_;
 }
 
 // Runs on the background thread.
 void BackendIO::ExecuteBackendOperation() {
   switch (operation_) {
     case OP_INIT:
-      result_ = backend_->SyncInit();
+      result_ = backend_->SyncInit(GetCallbackThread());
       break;
     case OP_OPEN:
       result_ = backend_->SyncOpenEntry(key_, entry_ptr_);
       break;
     case OP_CREATE:
       result_ = backend_->SyncCreateEntry(key_, entry_ptr_);
       break;
     case OP_DOOM:
       result_ = backend_->SyncDoomEntry(key_);
       break;
@@ skipping 273 matching lines @@
   background_thread_->PostTask(FROM_HERE,
       base::Bind(&BackendIO::ExecuteOperation, operation));
   OnOperationPosted(operation);
 }
 
 base::WeakPtr<InFlightBackendIO> InFlightBackendIO::GetWeakPtr() {
   return ptr_factory_.GetWeakPtr();
 }
 
 }  // namespace