* Revert "Por rt flush_cache tool."

chrome/test/test_file_util.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 <vector>
 #include <windows.h>
 
 #include "chrome/test/test_file_util.h"
 
 #include "base/file_util.h"
 #include "chrome/common/win_util.h"
 
 namespace file_util {
 
+bool EvictFileFromSystemCache(const wchar_t* file) {
+  // Request exclusive access to the file and overwrite it with no buffering.
+  win_util::ScopedHandle hfile(
+      CreateFile(file, GENERIC_READ | GENERIC_WRITE, 0, NULL,
+                 OPEN_EXISTING, FILE_FLAG_NO_BUFFERING,
+                 NULL));
+  if (!hfile)
+    return false;
+
+  // Execute in chunks. It could be optimized. We want to do few of these since
+  // these opterations will be slow without the cache.
+  char buffer[4096];
+  int total_bytes = 0;
+  DWORD bytes_read;
+  for (;;) {
+    bytes_read = 0;
+    ReadFile(hfile, buffer, sizeof(buffer), &bytes_read, NULL);
+    if (bytes_read == 0)
+      break;
+
+    SetFilePointer(hfile, total_bytes, 0, FILE_BEGIN);
+    if (!WriteFile(hfile, buffer, bytes_read, &bytes_read, NULL))
+      return false;
+    total_bytes += bytes_read;
+  }
+  return true;
+}
+
 // Like CopyFileNoCache but recursively copies all files and subdirectories
 // in the given input directory to the output directory.
 bool CopyRecursiveDirNoCache(const std::wstring& source_dir,
                              const std::wstring& dest_dir) {
   // Try to create the directory if it doesn't already exist.
   if (!CreateDirectory(dest_dir)) {
     if (GetLastError() != ERROR_ALREADY_EXISTS)
       return false;
   }
 
@@ skipping 28 matching lines @@
       // Copy the file.
       if (!::CopyFile(cur_source_path.c_str(), cur_dest_path.c_str(), false)) {
         FindClose(fh);
         return false;
       }
 
       // We don't check for errors from this function, often, we are copying
       // files that are in the repository, and they will have read-only set.
       // This will prevent us from evicting from the cache, but these don't
       // matter anyway.
-      file_util::EvictFileFromSystemCache(cur_dest_path.c_str());
+      EvictFileFromSystemCache(cur_dest_path.c_str());
     }
   } while (FindNextFile(fh, &fd));
 
   FindClose(fh);
   return true;
 }
 
 }  // namespace file_util