Split up chrome/browser/policy subdirectory

chrome/browser/policy/resource_cache.cc

Index: chrome/browser/policy/resource_cache.cc
diff --git a/chrome/browser/policy/resource_cache.cc b/chrome/browser/policy/resource_cache.cc
deleted file mode 100644
index a0125c3bbbc625321b59488ff0b43b068190a775..0000000000000000000000000000000000000000
--- a/chrome/browser/policy/resource_cache.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright (c) 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.
-
-#include "chrome/browser/policy/resource_cache.h"
-
-#include <string.h>
-
-#include "base/file_util.h"
-#include "base/files/file_path.h"
-#include "base/logging.h"
-#include "base/string_util.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/threading/thread_restrictions.h"
-#include "third_party/leveldatabase/src/include/leveldb/db.h"
-#include "third_party/leveldatabase/src/include/leveldb/iterator.h"
-#include "third_party/leveldatabase/src/include/leveldb/options.h"
-#include "third_party/leveldatabase/src/include/leveldb/slice.h"
-#include "third_party/leveldatabase/src/include/leveldb/status.h"
-#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
-
-namespace policy {
-
-ResourceCache::ResourceCache(const base::FilePath& cache_path) {
-  // Allow the cache to be created in a different thread than the thread that's
-  // going to use it.
-  DetachFromThread();
-
-  file_util::CreateDirectory(cache_path.DirName());
-  leveldb::Options options;
-  options.create_if_missing = true;
-  leveldb::DB* db = NULL;
-  leveldb::Status status =
-      leveldb::DB::Open(options, cache_path.AsUTF8Unsafe(), &db);
-  if (!status.ok()) {
-    LOG(WARNING) << "Failed to open leveldb at " << cache_path.AsUTF8Unsafe()
-                 << ": " << status.ToString();
-    // Maybe the database is busted; drop everything and try to create it again.
-    file_util::Delete(cache_path, true);
-    status = leveldb::DB::Open(options, cache_path.AsUTF8Unsafe(), &db);
-
-    if (!status.ok())
-      LOG(WARNING) << "Failed to open a new leveldb after wiping: "
-                   << status.ToString();
-  }
-  db_.reset(db);
-}
-
-ResourceCache::~ResourceCache() {
-  DCHECK(CalledOnValidThread());
-}
-
-bool ResourceCache::Store(const std::string& key,
-                          const std::string& subkey,
-                          const std::string& data) {
-  DCHECK(CalledOnValidThread());
-  base::ThreadRestrictions::AssertIOAllowed();
-
-  if (!IsOpen())
-    return false;
-
-  std::string path(CreatePath(key, subkey));
-  return db_->Put(leveldb::WriteOptions(), path, data).ok();
-}
-
-bool ResourceCache::Load(const std::string& key,
-                         const std::string& subkey,
-                         std::string* data) {
-  DCHECK(CalledOnValidThread());
-  base::ThreadRestrictions::AssertIOAllowed();
-  if (!IsOpen())
-    return false;
-
-  leveldb::ReadOptions options;
-  options.fill_cache = false;
-  std::string path(CreatePath(key, subkey));
-  return db_->Get(options, path, data).ok();
-}
-
-void ResourceCache::LoadAllSubkeys(
-    const std::string& key,
-    std::map<std::string, std::string>* contents) {
-  DCHECK(CalledOnValidThread());
-  base::ThreadRestrictions::AssertIOAllowed();
-  if (!IsOpen())
-    return;
-
-  contents->clear();
-
-  const std::string prefix(CreatePathPrefix(key));
-  leveldb::ReadOptions options;
-  options.fill_cache = false;
-  scoped_ptr<leveldb::Iterator> it(db_->NewIterator(options));
-  for (it->Seek(prefix); it->Valid(); it->Next()) {
-    if (!it->key().starts_with(prefix))
-      break;
-    const std::string subkey(GetSubkey(it->key().ToString()));
-    leveldb::Slice slice = it->value();
-    (*contents)[subkey].assign(slice.data(), slice.size());
-  }
-}
-
-void ResourceCache::Delete(const std::string& key, const std::string& subkey) {
-  DCHECK(CalledOnValidThread());
-  base::ThreadRestrictions::AssertIOAllowed();
-  if (!IsOpen())
-    return;
-
-  const std::string path(CreatePath(key, subkey));
-  leveldb::Status status = db_->Delete(leveldb::WriteOptions(), path);
-  if (!status.ok()) {
-    LOG(WARNING) << "Failed to Delete \"" << path << "\" from leveldb: "
-                 << status.ToString();
-  }
-}
-
-void ResourceCache::PurgeOtherSubkeys(
-    const std::string& key,
-    const std::set<std::string>& subkeys_to_keep) {
-  DCHECK(CalledOnValidThread());
-  base::ThreadRestrictions::AssertIOAllowed();
-  if (!IsOpen())
-    return;
-
-  leveldb::WriteBatch batch;
-  const std::string prefix(CreatePathPrefix(key));
-  leveldb::ReadOptions options;
-  options.fill_cache = false;
-  scoped_ptr<leveldb::Iterator> it(db_->NewIterator(options));
-  for (it->Seek(prefix); it->Valid(); it->Next()) {
-    if (!it->key().starts_with(prefix))
-      break;
-    const std::string subkey(GetSubkey(it->key().ToString()));
-    if (subkeys_to_keep.find(subkey) == subkeys_to_keep.end())
-      batch.Delete(it->key());
-  }
-
-  leveldb::Status status = db_->Write(leveldb::WriteOptions(), &batch);
-  if (!status.ok()) {
-    LOG(WARNING) << "Purge of leveldb subkeys of " << key << " failed: "
-                 << status.ToString();
-  }
-}
-
-std::string ResourceCache::GetStringWithPrefix(const std::string& s) {
-  char buffer[sizeof(size_t)];
-  size_t size = s.size();
-  memcpy(buffer, &size, sizeof(size_t));
-  return std::string(buffer, sizeof(size_t)) + s;
-}
-
-std::string ResourceCache::CreatePathPrefix(const std::string& key) {
-  return GetStringWithPrefix(key);
-}
-
-std::string ResourceCache::CreatePath(const std::string& key,
-                                      const std::string& subkey) {
-  return GetStringWithPrefix(key) + GetStringWithPrefix(subkey);
-}
-
-std::string ResourceCache::GetSubkey(const std::string& path) {
-  // |path| was produced by CreatePath(). Skip the first key, then skip the
-  // size of the subkey.
-  if (path.size() < sizeof(size_t)) {
-    NOTREACHED();
-    return EmptyString();
-  }
-
-  // Skip the first string. |offset| is the start of the second string,
-  // immediately preceded by its size.
-  const size_t* size = reinterpret_cast<const size_t*>(path.data());
-  size_t offset = sizeof(size_t) + *size + sizeof(size_t);
-  if (path.size() < offset) {
-    NOTREACHED();
-    return EmptyString();
-  }
-
-  // Skip the size of the second string.
-  size = reinterpret_cast<const size_t*>(path.data() + offset - sizeof(size_t));
-  if (*size != path.size() - offset) {
-    NOTREACHED();
-    return EmptyString();
-  }
-
-  return path.substr(offset, *size);
-}
-
-}  // namespace policy