Move chrome/browser/nacl_host/pnacl_translation_cache.* to components/nacl/browser

chrome/browser/nacl_host/pnacl_translation_cache.h

-// Copyright 2013 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 CHROME_BROWSER_NACL_HOST_PNACL_TRANSLATION_CACHE_H_
-#define CHROME_BROWSER_NACL_HOST_PNACL_TRANSLATION_CACHE_H_
-
-#include <map>
-
-#include "base/callback.h"
-#include "base/files/file_path.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "net/base/cache_type.h"
-
-namespace base {
-class MessageLoopProxy;
-}
-
-namespace disk_cache {
-class Backend;
-}
-
-namespace nacl {
-struct PnaclCacheInfo;
-}
-
-namespace net {
-class DrainableIOBuffer;
-}
-
-namespace pnacl {
-typedef base::Callback<void(int)> CompletionCallback;
-typedef base::Callback<void(int, scoped_refptr<net::DrainableIOBuffer>)>
-    GetNexeCallback;
-class PnaclTranslationCacheEntry;
-extern const int kMaxMemCacheSize;
-
-class PnaclTranslationCache
-    : public base::SupportsWeakPtr<PnaclTranslationCache> {
- public:
-  PnaclTranslationCache();
-  virtual ~PnaclTranslationCache();
-
-  // Initialize the translation cache in |cache_dir|.  If the return value is
-  // net::ERR_IO_PENDING, |callback| will be called with a 0 argument on sucess
-  // and <0 otherwise.
-  int InitOnDisk(const base::FilePath& cache_dir,
-                 const CompletionCallback& callback);
-
-  // Initialize the translation cache in memory.  If the return value is
-  // net::ERR_IO_PENDING, |callback| will be called with a 0 argument on sucess
-  // and <0 otherwise.
-  int InitInMemory(const CompletionCallback& callback);
-
-  // Store the nexe in the translation cache, and call |callback| with
-  // the result. The result passed to the callback is 0 on success and
-  // <0 otherwise. A reference to |nexe_data| is held until completion
-  // or cancellation.
-  void StoreNexe(const std::string& key,
-                 net::DrainableIOBuffer* nexe_data,
-                 const CompletionCallback& callback);
-
-  // Retrieve the nexe from the translation cache. Write the data into |nexe|
-  // and call |callback|, passing a result code (0 on success and <0 otherwise),
-  // and a DrainableIOBuffer with the data.
-  void GetNexe(const std::string& key, const GetNexeCallback& callback);
-
-  // Return the number of entries in the cache backend.
-  int Size();
-
-  // Return the cache key for |info|
-  static std::string GetKey(const nacl::PnaclCacheInfo& info);
-
-  // Doom all entries between |initial| and |end|. If the return value is
-  // net::ERR_IO_PENDING, |callback| will be invoked when the operation
-  // completes.
-  int DoomEntriesBetween(base::Time initial, base::Time end,
-                         const CompletionCallback& callback);
-
- private:
-  friend class PnaclTranslationCacheEntry;
-  friend class PnaclTranslationCacheTest;
-  // PnaclTranslationCacheEntry should only use the
-  // OpComplete and backend methods on PnaclTranslationCache.
-  void OpComplete(PnaclTranslationCacheEntry* entry);
-  disk_cache::Backend* backend() { return disk_cache_.get(); }
-
-  int Init(net::CacheType,
-           const base::FilePath& directory,
-           int cache_size,
-           const CompletionCallback& callback);
-
-  void OnCreateBackendComplete(int rv);
-
-  scoped_ptr<disk_cache::Backend> disk_cache_;
-  CompletionCallback init_callback_;
-  bool in_memory_;
-  std::map<void*, scoped_refptr<PnaclTranslationCacheEntry> > open_entries_;
-
-  DISALLOW_COPY_AND_ASSIGN(PnaclTranslationCache);
-};
-
-}  // namespace pnacl
-
-#endif  // CHROME_BROWSER_NACL_HOST_PNACL_TRANSLATION_CACHE_H_