Adding a simple class for dumping the contents of a cache. Use this new class in dump_cache.

net/tools/dump_cache/cache_dumper.h

 // 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.
 
 #ifndef NET_TOOLS_DUMP_CACHE_CACHE_DUMPER_H_
 #define NET_TOOLS_DUMP_CACHE_CACHE_DUMPER_H_
 
 #include <string>
 
 #include "base/file_path.h"
@@ skipping 28 matching lines @@
                          const net::CompletionCallback& callback) = 0;
 
   // Close the current entry.
   virtual void CloseEntry(disk_cache::Entry* entry, base::Time last_used,
                           base::Time last_modified) = 0;
 };
 
 // Writes data to a cache.
 class CacheDumper : public CacheDumpWriter {
  public:
-  explicit CacheDumper(disk_cache::Backend* cache) : cache_(cache) {}
+  explicit CacheDumper(disk_cache::Backend* cache);
 
   virtual int CreateEntry(const std::string& key, disk_cache::Entry** entry,
-                          const net::CompletionCallback& callback);
+                          const net::CompletionCallback& callback) OVERRIDE;
   virtual int WriteEntry(disk_cache::Entry* entry, int stream, int offset,
                          net::IOBuffer* buf, int buf_len,
-                         const net::CompletionCallback& callback);
+                         const net::CompletionCallback& callback) OVERRIDE;
   virtual void CloseEntry(disk_cache::Entry* entry, base::Time last_used,
-                          base::Time last_modified);
+                          base::Time last_modified) OVERRIDE;
 
  private:
   disk_cache::Backend* cache_;
 };
 
 // Writes data to a disk.
 class DiskDumper : public CacheDumpWriter {
  public:
-  explicit DiskDumper(const FilePath& path) : path_(path), entry_(NULL) {
-    file_util::CreateDirectory(path);
-  }
+  explicit DiskDumper(const FilePath& path);
+
   virtual int CreateEntry(const std::string& key, disk_cache::Entry** entry,
-                          const net::CompletionCallback& callback);
+                          const net::CompletionCallback& callback) OVERRIDE;
   virtual int WriteEntry(disk_cache::Entry* entry, int stream, int offset,
                          net::IOBuffer* buf, int buf_len,
-                         const net::CompletionCallback& callback);
+                         const net::CompletionCallback& callback) OVERRIDE;
   virtual void CloseEntry(disk_cache::Entry* entry, base::Time last_used,
-                          base::Time last_modified);
+                          base::Time last_modified) OVERRIDE;
 
  private:
   FilePath path_;
   // This is a bit of a hack.  As we get a CreateEntry, we coin the current
   // entry_path_ where we write that entry to disk.  Subsequent calls to
   // WriteEntry() utilize this path for writing to disk.
   FilePath entry_path_;
   std::string entry_url_;
 #ifdef WIN32_LARGE_FILENAME_SUPPORT
   HANDLE entry_;
 #else
   FILE* entry_;
 #endif
 };
 
 #endif  // NET_TOOLS_DUMP_CACHE_CACHE_DUMPER_H_