Disk cache: A few minor fixes to make coverity happy.

net/disk_cache/file_win.cc

 // Copyright (c) 2006-2008 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/file.h"
 
 #include "base/message_loop.h"
 #include "base/singleton.h"
 #include "net/disk_cache/disk_cache.h"
 
@@ skipping 44 matching lines @@
   memset(this, 0, sizeof(*this));
   context_.handler = Singleton<CompletionHandler>::get();
   context_.overlapped.Offset = static_cast<DWORD>(offset);
   file_ = file;
   callback_ = callback;
 }
 
 MyOverlapped::~MyOverlapped() {
   if (delete_buffer_) {
     DCHECK(!callback_);
-    delete buffer_;
+    // This whole thing could be updated to use IOBuffer, but PostWrite is not
+    // used at the moment. TODO(rvargas): remove or update this code.
+    delete[] reinterpret_cast<const char*>(buffer_);
   }
 }
 
 }  // namespace
 
 namespace disk_cache {
 
 // Used from WaitForPendingIO() when the cache is being destroyed.
 MessageLoopForIO::IOHandler* GetFileIOHandler() {
   return Singleton<CompletionHandler>::get();
@@ skipping 186 matching lines @@
   HANDLE file = platform_file();
   if (!GetFileSizeEx(file, &size))
     return 0;
   if (size.HighPart)
     return ULONG_MAX;
 
   return static_cast<size_t>(size.LowPart);
 }
 
 }  // namespace disk_cache