Avoids the use of "namespace using-directives" in a few places....

net/disk_cache/disk_cache_test_util.cc

 // Copyright (c) 2006-2009 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/disk_cache_test_util.h"
 
 #include "base/logging.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "net/base/net_errors.h"
@@ skipping 41 matching lines @@
   }
   if (len && !buffer[0])
     buffer[0] = 'g';
 }
 
 std::wstring GetCachePath() {
   return BuildCachePath(L"cache_test");
 }
 
 bool CreateCacheTestFile(const wchar_t* name) {
-  using namespace disk_cache;
   int flags = base::PLATFORM_FILE_CREATE_ALWAYS |
               base::PLATFORM_FILE_READ |
               base::PLATFORM_FILE_WRITE;
 
-  scoped_refptr<File> file(new File(
+  scoped_refptr<disk_cache::File> file(new disk_cache::File(
       base::CreatePlatformFile(name, flags, NULL)));
   if (!file->IsValid())
     return false;
 
   file->SetLength(4 * 1024 * 1024);
   return true;
 }
 
 bool DeleteCache(const wchar_t* path) {
   disk_cache::DeleteCache(path, false);
@@ skipping 85 matching lines @@
   } else {
     // Not finished yet. See if we have to abort.
     if (last_ == g_cache_tests_received)
       num_iterations_++;
     else
       last_ = g_cache_tests_received;
     if (40 == num_iterations_)
       MessageLoop::current()->Quit();
   }
 }