Move platform_thread to base/threading and put in the base namespace. I left ...

net/disk_cache/block_files.cc

 // Copyright (c) 2006-2010 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/block_files.h"
 
 #include "base/file_util.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
-#include "base/thread_checker.h"
+#include "base/threading/thread_checker.h"
 #include "base/time.h"
 #include "net/disk_cache/cache_util.h"
 #include "net/disk_cache/file_lock.h"
 #include "net/disk_cache/trace.h"
 
 using base::TimeTicks;
 
 namespace {
 
 const char* kBlockName = "data_";
@@ skipping 172 matching lines @@
   if (zero_buffer_)
     delete[] zero_buffer_;
   CloseFiles();
 }
 
 bool BlockFiles::Init(bool create_files) {
   DCHECK(!init_);
   if (init_)
     return false;
 
-  thread_checker_.reset(new ThreadChecker);
+  thread_checker_.reset(new base::ThreadChecker);
 
   block_files_.resize(kFirstAdditionalBlockFile);
   for (int i = 0; i < kFirstAdditionalBlockFile; i++) {
     if (create_files)
       if (!CreateBlockFile(i, static_cast<FileType>(i + 1), true))
         return false;
 
     if (!OpenBlockFile(i))
       return false;
 
@@ skipping 397 matching lines @@
 }
 
 FilePath BlockFiles::Name(int index) {
   // The file format allows for 256 files.
   DCHECK(index < 256 || index >= 0);
   std::string tmp = base::StringPrintf("%s%d", kBlockName, index);
   return path_.AppendASCII(tmp);
 }
 
 }  // namespace disk_cache