Clean up dependencies for disk_cache histogram_macros.h.

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"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/backend_impl.h"
 #include "net/disk_cache/entry_impl.h"
+
+// Define BLOCKFILE_BACKEND_IMPL_OBJ to be a disk_cache::BackendImpl* in order
+// to use the CACHE_UMA histogram macro.
+#define BLOCKFILE_BACKEND_IMPL_OBJ backend_
 #include "net/disk_cache/histogram_macros.h"
 
 namespace disk_cache {
 
 BackendIO::BackendIO(InFlightIO* controller, BackendImpl* backend,
                      const net::CompletionCallback& callback)
     : BackgroundIO(controller),
       backend_(backend),
       callback_(callback),
       operation_(OP_NONE),
@@ skipping 489 matching lines @@
   background_thread_->PostTask(FROM_HERE,
       base::Bind(&BackendIO::ExecuteOperation, operation));
   OnOperationPosted(operation);
 }
 
 base::WeakPtr<InFlightBackendIO> InFlightBackendIO::GetWeakPtr() {
   return ptr_factory_.GetWeakPtr();
 }
 
 }  // namespace