chromeos: Stop returning scoped_ptr from GDataCache::GetCacheEntry

chrome/browser/chromeos/gdata/gdata_cache.cc

 // 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.
 
 #include "chrome/browser/chromeos/gdata/gdata_cache.h"
 
 #include <vector>
 
 #include "base/chromeos/chromeos_version.h"
 #include "base/file_util.h"
@@ skipping 693 matching lines @@
 }
 
 void GDataCache::RequestInitializeOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   pool_->GetSequencedTaskRunner(sequence_token_)->PostTask(
       FROM_HERE,
       base::Bind(&GDataCache::Initialize, base::Unretained(this)));
 }
 
-scoped_ptr<GDataCacheEntry> GDataCache::GetCacheEntry(
-    const std::string& resource_id,
-    const std::string& md5) {
+bool GDataCache::GetCacheEntry(const std::string& resource_id,
+                               const std::string& md5,
+                               GDataCacheEntry* entry) {
+  DCHECK(entry);
   AssertOnSequencedWorkerPool();
-  return metadata_->GetCacheEntry(resource_id, md5);
+  return metadata_->GetCacheEntry(resource_id, md5, entry);
 }
 
 // static
 GDataCache* GDataCache::CreateGDataCacheOnUIThread(
     const FilePath& cache_root_path,
     base::SequencedWorkerPool* pool,
     const base::SequencedWorkerPool::SequenceToken& sequence_token) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return new GDataCache(cache_root_path, pool, sequence_token);
 }
@@ skipping 44 matching lines @@
 }
 
 void GDataCache::GetFile(const std::string& resource_id,
                          const std::string& md5,
                          base::PlatformFileError* error,
                          FilePath* cache_file_path) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
   DCHECK(cache_file_path);
 
-  scoped_ptr<GDataCacheEntry> cache_entry = GetCacheEntry(
-      resource_id, md5);
-  if (cache_entry.get() && cache_entry->IsPresent()) {
+  GDataCacheEntry cache_entry;
+  if (GetCacheEntry(resource_id, md5, &cache_entry) &&
+      cache_entry.IsPresent()) {
     CachedFileOrigin file_origin;
-    if (cache_entry->IsMounted()) {
+    if (cache_entry.IsMounted()) {
       file_origin = CACHED_FILE_MOUNTED;
-    } else if (cache_entry->IsDirty()) {
+    } else if (cache_entry.IsDirty()) {
       file_origin = CACHED_FILE_LOCALLY_MODIFIED;
     } else {
       file_origin = CACHED_FILE_FROM_SERVER;
     }
     *cache_file_path = GetCacheFilePath(
         resource_id,
         md5,
-        GetSubDirectoryType(*cache_entry),
+        GetSubDirectoryType(cache_entry),
         file_origin);
     *error = base::PLATFORM_FILE_OK;
   } else {
     *error = base::PLATFORM_FILE_ERROR_NOT_FOUND;
   }
 }
 
 void GDataCache::Store(const std::string& resource_id,
                        const std::string& md5,
                        const FilePath& source_path,
                        FileOperationType file_operation_type,
                        base::PlatformFileError* error) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
 
   FilePath dest_path;
   FilePath symlink_path;
   CacheSubDirectoryType sub_dir_type = CACHE_TYPE_TMP;
 
-  scoped_ptr<GDataCacheEntry> cache_entry = GetCacheEntry(resource_id, md5);
-
   // If file was previously pinned, store it in persistent dir and create
   // symlink in pinned dir.
-  if (cache_entry.get()) {  // File exists in cache.
+  GDataCacheEntry cache_entry;
+  if (GetCacheEntry(resource_id, md5, &cache_entry)) {  // File exists in cache.
     // If file is dirty or mounted, return error.
-    if (cache_entry->IsDirty() || cache_entry->IsMounted()) {
+    if (cache_entry.IsDirty() || cache_entry.IsMounted()) {
       LOG(WARNING) << "Can't store a file to replace a "
-                   << (cache_entry->IsDirty() ? "dirty" : "mounted")
+                   << (cache_entry.IsDirty() ? "dirty" : "mounted")
                    << " file: res_id=" << resource_id
                    << ", md5=" << md5;
       *error = base::PLATFORM_FILE_ERROR_IN_USE;
       return;
     }
 
     // If file is pinned, determines destination path.
-    if (cache_entry->IsPinned()) {
+    if (cache_entry.IsPinned()) {
       sub_dir_type = CACHE_TYPE_PERSISTENT;
       dest_path = GetCacheFilePath(resource_id, md5, sub_dir_type,
                                    CACHED_FILE_FROM_SERVER);
       symlink_path = GetCacheFilePath(
           resource_id, std::string(), CACHE_TYPE_PINNED,
           CACHED_FILE_FROM_SERVER);
     }
-  } else {
-    // The file does not exist in the cache. Create a new entry.
-    cache_entry.reset(new GDataCacheEntry);
   }
 
   // File wasn't pinned or doesn't exist in cache, store in tmp dir.
   if (dest_path.empty()) {
     DCHECK_EQ(CACHE_TYPE_TMP, sub_dir_type);
     dest_path = GetCacheFilePath(resource_id, md5, sub_dir_type,
                                  CACHED_FILE_FROM_SERVER);
   }
 
   *error = ModifyCacheState(
@@ skipping 19 matching lines @@
     // Note that ReplaceExtension automatically prefixes the extension with the
     // extension separator '.'.
     stale_filenames_pattern = dest_path.ReplaceExtension(util::kWildCard);
   }
 
   // Delete files that match |stale_filenames_pattern| except for |dest_path|.
   DeleteFilesSelectively(stale_filenames_pattern, dest_path);
 
   if (*error == base::PLATFORM_FILE_OK) {
     // Now that file operations have completed, update cache map.
-    cache_entry->set_md5(md5);
-    cache_entry->SetPresent(true);
-    cache_entry->SetPersistent(sub_dir_type == CACHE_TYPE_PERSISTENT);
-    metadata_->AddOrUpdateCacheEntry(resource_id, *cache_entry);
+    cache_entry.set_md5(md5);
+    cache_entry.SetPresent(true);
+    cache_entry.SetPersistent(sub_dir_type == CACHE_TYPE_PERSISTENT);
+    metadata_->AddOrUpdateCacheEntry(resource_id, cache_entry);
   }
 }
 
 void GDataCache::Pin(const std::string& resource_id,
                      const std::string& md5,
                      FileOperationType file_operation_type,
                      base::PlatformFileError* error) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
 
   FilePath source_path;
   FilePath dest_path;
   FilePath symlink_path;
   bool create_symlink = true;
   CacheSubDirectoryType sub_dir_type = CACHE_TYPE_PERSISTENT;
 
-  scoped_ptr<GDataCacheEntry> cache_entry = GetCacheEntry(resource_id, md5);
-
-  if (!cache_entry.get()) {  // Entry does not exist in cache.
+  GDataCacheEntry cache_entry;
+  if (!GetCacheEntry(resource_id, md5, &cache_entry)) {
+    // Entry does not exist in cache.
     // Set both |dest_path| and |source_path| to /dev/null, so that:
     // 1) ModifyCacheState won't move files when |source_path| and |dest_path|
     //    are the same.
     // 2) symlinks to /dev/null will be picked up by GDataSyncClient to download
     //    pinned files that don't exist in cache.
     dest_path = FilePath::FromUTF8Unsafe(util::kSymLinkToDevNull);
     source_path = dest_path;
 
     // Set sub_dir_type to TMP. The file will be first downloaded in 'tmp',
     // then moved to 'persistent'.
     sub_dir_type = CACHE_TYPE_TMP;
-
-    // We'll add a new cache entry.
-    cache_entry.reset(new GDataCacheEntry);
   } else {  // File exists in cache, determines destination path.
     // Determine source and destination paths.
 
     // If file is dirty or mounted, don't move it, so determine |dest_path| and
     // set |source_path| the same, because ModifyCacheState only moves files if
     // source and destination are different.
-    if (cache_entry->IsDirty() || cache_entry->IsMounted()) {
-      DCHECK(cache_entry->IsPersistent());
+    if (cache_entry.IsDirty() || cache_entry.IsMounted()) {
+      DCHECK(cache_entry.IsPersistent());
       dest_path = GetCacheFilePath(resource_id,
                                    md5,
-                                   GetSubDirectoryType(*cache_entry),
+                                   GetSubDirectoryType(cache_entry),
                                    CACHED_FILE_LOCALLY_MODIFIED);
       source_path = dest_path;
     } else {
       // Gets the current path of the file in cache.
       source_path = GetCacheFilePath(resource_id,
                                      md5,
-                                     GetSubDirectoryType(*cache_entry),
+                                     GetSubDirectoryType(cache_entry),
                                      CACHED_FILE_FROM_SERVER);
 
       // If file was pinned before but actual file blob doesn't exist in cache:
       // - don't need to move the file, so set |dest_path| to |source_path|,
       //   because ModifyCacheState only moves files if source and destination
       //   are different
       // - don't create symlink since it already exists.
-      if (!cache_entry->IsPresent()) {
+      if (!cache_entry.IsPresent()) {
         dest_path = source_path;
         create_symlink = false;
       } else {  // File exists, move it to persistent dir.
         dest_path = GetCacheFilePath(resource_id,
                                      md5,
                                      CACHE_TYPE_PERSISTENT,
                                      CACHED_FILE_FROM_SERVER);
       }
     }
   }
 
   // Create symlink in pinned dir.
   if (create_symlink) {
     symlink_path = GetCacheFilePath(resource_id,
                                     std::string(),
                                     CACHE_TYPE_PINNED,
                                     CACHED_FILE_FROM_SERVER);
   }
 
   *error = ModifyCacheState(source_path,
                             dest_path,
                             file_operation_type,
                             symlink_path,
                             create_symlink);
 
   if (*error == base::PLATFORM_FILE_OK) {
     // Now that file operations have completed, update cache map.
-    cache_entry->set_md5(md5);
-    cache_entry->SetPinned(true);
-    cache_entry->SetPersistent(sub_dir_type == CACHE_TYPE_PERSISTENT);
-    metadata_->AddOrUpdateCacheEntry(resource_id, *cache_entry);
+    cache_entry.set_md5(md5);
+    cache_entry.SetPinned(true);
+    cache_entry.SetPersistent(sub_dir_type == CACHE_TYPE_PERSISTENT);
+    metadata_->AddOrUpdateCacheEntry(resource_id, cache_entry);
   }
 }
 
 void GDataCache::Unpin(const std::string& resource_id,
                        const std::string& md5,
                        FileOperationType file_operation_type,
                        base::PlatformFileError* error) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
 
-  scoped_ptr<GDataCacheEntry> cache_entry = GetCacheEntry(resource_id, md5);
-
   // Unpinning a file means its entry must exist in cache.
-  if (!cache_entry.get()) {
+  GDataCacheEntry cache_entry;
+  if (!GetCacheEntry(resource_id, md5, &cache_entry)) {
     LOG(WARNING) << "Can't unpin a file that wasn't pinned or cached: res_id="
                  << resource_id
                  << ", md5=" << md5;
     *error = base::PLATFORM_FILE_ERROR_NOT_FOUND;
     return;
   }
 
   // Entry exists in cache, determines source and destination paths.
 
   FilePath source_path;
   FilePath dest_path;
   CacheSubDirectoryType sub_dir_type = CACHE_TYPE_TMP;
 
   // If file is dirty or mounted, don't move it, so determine |dest_path| and
   // set |source_path| the same, because ModifyCacheState moves files if source
   // and destination are different.
-  if (cache_entry->IsDirty() || cache_entry->IsMounted()) {
+  if (cache_entry.IsDirty() || cache_entry.IsMounted()) {
     sub_dir_type = CACHE_TYPE_PERSISTENT;
-    DCHECK(cache_entry->IsPersistent());
+    DCHECK(cache_entry.IsPersistent());
     dest_path = GetCacheFilePath(resource_id,
                                  md5,
-                                 GetSubDirectoryType(*cache_entry),
+                                 GetSubDirectoryType(cache_entry),
                                  CACHED_FILE_LOCALLY_MODIFIED);
     source_path = dest_path;
   } else {
     // Gets the current path of the file in cache.
     source_path = GetCacheFilePath(resource_id,
                                    md5,
-                                   GetSubDirectoryType(*cache_entry),
+                                   GetSubDirectoryType(cache_entry),
                                    CACHED_FILE_FROM_SERVER);
 
     // If file was pinned but actual file blob still doesn't exist in cache,
     // don't need to move the file, so set |dest_path| to |source_path|, because
     // ModifyCacheState only moves files if source and destination are
     // different.
-    if (!cache_entry->IsPresent()) {
+    if (!cache_entry.IsPresent()) {
       dest_path = source_path;
     } else {  // File exists, move it to tmp dir.
       dest_path = GetCacheFilePath(resource_id, md5,
                                    CACHE_TYPE_TMP,
                                    CACHED_FILE_FROM_SERVER);
     }
   }
 
   // If file was pinned, get absolute path of symlink in pinned dir so as to
   // remove it.
   FilePath symlink_path;
-  if (cache_entry->IsPinned()) {
+  if (cache_entry.IsPinned()) {
     symlink_path = GetCacheFilePath(resource_id,
                                     std::string(),
                                     CACHE_TYPE_PINNED,
                                     CACHED_FILE_FROM_SERVER);
   }
 
   *error = ModifyCacheState(
       source_path,
       dest_path,
       file_operation_type,
       symlink_path,  // This will be deleted if it exists.
       false /* don't create symlink*/);
 
   if (*error == base::PLATFORM_FILE_OK) {
     // Now that file operations have completed, update cache map.
-    if (cache_entry->IsPresent()) {
-      GDataCacheEntry new_cache_entry(md5, cache_entry->cache_state());
+    if (cache_entry.IsPresent()) {
+      GDataCacheEntry new_cache_entry(md5, cache_entry.cache_state());
       new_cache_entry.SetPinned(false);
       new_cache_entry.SetPersistent(sub_dir_type == CACHE_TYPE_PERSISTENT);
       metadata_->AddOrUpdateCacheEntry(resource_id, new_cache_entry);
     } else {
       // Remove the existing entry if we are unpinning a non-present file.
       metadata_->RemoveCacheEntry(resource_id);
     }
   }
 }
 
 void GDataCache::SetMountedState(const FilePath& file_path,
                                  bool to_mount,
                                  base::PlatformFileError *error,
                                  FilePath* cache_file_path) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
   DCHECK(cache_file_path);
 
   // Parse file path to obtain resource_id, md5 and extra_extension.
   std::string resource_id;
   std::string md5;
   std::string extra_extension;
   util::ParseCacheFilePath(file_path, &resource_id, &md5, &extra_extension);
   // The extra_extension shall be ".mounted" iff we're unmounting.
   DCHECK(!to_mount == (extra_extension == util::kMountedArchiveFileExtension));
 
   // Get cache entry associated with the resource_id and md5
-  scoped_ptr<GDataCacheEntry> cache_entry = GetCacheEntry(
-      resource_id, md5);
-  if (!cache_entry.get()) {
+  GDataCacheEntry cache_entry;
+  if (!GetCacheEntry(resource_id, md5, &cache_entry)) {
     *error = base::PLATFORM_FILE_ERROR_NOT_FOUND;
     return;
   }
-  if (to_mount == cache_entry->IsMounted()) {
+  if (to_mount == cache_entry.IsMounted()) {
     *error = base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
     return;
   }
 
   // Get the subdir type and path for the unmounted state.
   CacheSubDirectoryType unmounted_subdir =
-      cache_entry->IsPinned() ? CACHE_TYPE_PERSISTENT : CACHE_TYPE_TMP;
+      cache_entry.IsPinned() ? CACHE_TYPE_PERSISTENT : CACHE_TYPE_TMP;
   FilePath unmounted_path = GetCacheFilePath(
       resource_id, md5, unmounted_subdir, CACHED_FILE_FROM_SERVER);
 
   // Get the subdir type and path for the mounted state.
   CacheSubDirectoryType mounted_subdir = CACHE_TYPE_PERSISTENT;
   FilePath mounted_path = GetCacheFilePath(
       resource_id, md5, mounted_subdir, CACHED_FILE_MOUNTED);
 
   // Determine the source and destination paths for moving the cache blob.
   FilePath source_path;
   CacheSubDirectoryType dest_subdir;
-  GDataCacheEntry new_cache_entry(md5, cache_entry->cache_state());
+  GDataCacheEntry new_cache_entry(md5, cache_entry.cache_state());
   if (to_mount) {
     source_path = unmounted_path;
     *cache_file_path = mounted_path;
     dest_subdir = mounted_subdir;
     new_cache_entry.SetMounted(true);
   } else {
     source_path = mounted_path;
     *cache_file_path = unmounted_path;
     dest_subdir = unmounted_subdir;
     new_cache_entry.SetMounted(false);
@@ skipping 15 matching lines @@
                            base::PlatformFileError* error,
                            FilePath* cache_file_path) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
   DCHECK(cache_file_path);
 
   // If file has already been marked dirty in previous instance of chrome, we
   // would have lost the md5 info during cache initialization, because the file
   // would have been renamed to .local extension.
   // So, search for entry in cache without comparing md5.
-  scoped_ptr<GDataCacheEntry> cache_entry =
-      GetCacheEntry(resource_id, std::string());
 
   // Marking a file dirty means its entry and actual file blob must exist in
   // cache.
-  if (!cache_entry.get() || !cache_entry->IsPresent()) {
+  GDataCacheEntry cache_entry;
+  if (!GetCacheEntry(resource_id, std::string(), &cache_entry) ||
+      !cache_entry.IsPresent()) {
     LOG(WARNING) << "Can't mark dirty a file that wasn't cached: res_id="
                  << resource_id
                  << ", md5=" << md5;
     *error = base::PLATFORM_FILE_ERROR_NOT_FOUND;
     return;
   }
 
   // If a file is already dirty (i.e. MarkDirtyInCache was called before),
   // delete outgoing symlink if it exists.
   // TODO(benchan): We should only delete outgoing symlink if file is currently
   // not being uploaded.  However, for now, cache doesn't know if uploading of a
   // file is in progress.  Per zel, the upload process should be canceled before
   // MarkDirtyInCache is called again.
-  if (cache_entry->IsDirty()) {
+  if (cache_entry.IsDirty()) {
     // The file must be in persistent dir.
-    DCHECK(cache_entry->IsPersistent());
+    DCHECK(cache_entry.IsPersistent());
 
     // Determine symlink path in outgoing dir, so as to remove it.
     FilePath symlink_path = GetCacheFilePath(
         resource_id,
         std::string(),
         CACHE_TYPE_OUTGOING,
         CACHED_FILE_FROM_SERVER);
 
     // We're not moving files here, so simply use empty FilePath for both
     // |source_path| and |dest_path| because ModifyCacheState only move files
@@ skipping 15 matching lines @@
     }
     return;
   }
 
   // Move file to persistent dir with new .local extension.
 
   // Get the current path of the file in cache.
   FilePath source_path = GetCacheFilePath(
       resource_id,
       md5,
-      GetSubDirectoryType(*cache_entry),
+      GetSubDirectoryType(cache_entry),
       CACHED_FILE_FROM_SERVER);
 
   // Determine destination path.
   const CacheSubDirectoryType sub_dir_type = CACHE_TYPE_PERSISTENT;
   *cache_file_path = GetCacheFilePath(resource_id,
                                       md5,
                                       sub_dir_type,
                                       CACHED_FILE_LOCALLY_MODIFIED);
 
   // If file is pinned, update symlink in pinned dir.
   FilePath symlink_path;
-  if (cache_entry->IsPinned()) {
+  if (cache_entry.IsPinned()) {
     symlink_path = GetCacheFilePath(resource_id,
                                     std::string(),
                                     CACHE_TYPE_PINNED,
                                     CACHED_FILE_FROM_SERVER);
   }
 
   *error = ModifyCacheState(
       source_path,
       *cache_file_path,
       file_operation_type,
       symlink_path,
       !symlink_path.empty() /* create symlink */);
 
   if (*error == base::PLATFORM_FILE_OK) {
     // Now that file operations have completed, update cache map.
-    GDataCacheEntry new_cache_entry(md5, cache_entry->cache_state());
+    GDataCacheEntry new_cache_entry(md5, cache_entry.cache_state());
     new_cache_entry.SetDirty(true);
     new_cache_entry.SetPersistent(sub_dir_type == CACHE_TYPE_PERSISTENT);
     metadata_->AddOrUpdateCacheEntry(resource_id, new_cache_entry);
   }
 }
 
 void GDataCache::CommitDirty(const std::string& resource_id,
                              const std::string& md5,
                              FileOperationType file_operation_type,
                              base::PlatformFileError* error) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
 
   // If file has already been marked dirty in previous instance of chrome, we
   // would have lost the md5 info during cache initialization, because the file
   // would have been renamed to .local extension.
   // So, search for entry in cache without comparing md5.
-  scoped_ptr<GDataCacheEntry> cache_entry =
-      GetCacheEntry(resource_id, std::string());
 
   // Committing a file dirty means its entry and actual file blob must exist in
   // cache.
-  if (!cache_entry.get() || !cache_entry->IsPresent()) {
+  GDataCacheEntry cache_entry;
+  if (!GetCacheEntry(resource_id, std::string(), &cache_entry) ||
+      !cache_entry.IsPresent()) {
     LOG(WARNING) << "Can't commit dirty a file that wasn't cached: res_id="
                  << resource_id
                  << ", md5=" << md5;
     *error = base::PLATFORM_FILE_ERROR_NOT_FOUND;
     return;
   }
 
   // If a file is not dirty (it should have been marked dirty via
   // MarkDirtyInCache), committing it dirty is an invalid operation.
-  if (!cache_entry->IsDirty()) {
+  if (!cache_entry.IsDirty()) {
     LOG(WARNING) << "Can't commit a non-dirty file: res_id="
                  << resource_id
                  << ", md5=" << md5;
     *error = base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
     return;
   }
 
   // Dirty files must be in persistent dir.
-  DCHECK(cache_entry->IsPersistent());
+  DCHECK(cache_entry.IsPersistent());
 
   // Create symlink in outgoing dir.
   FilePath symlink_path = GetCacheFilePath(resource_id,
                                            std::string(),
                                            CACHE_TYPE_OUTGOING,
                                            CACHED_FILE_FROM_SERVER);
 
   // Get target path of symlink i.e. current path of the file in cache.
   FilePath target_path = GetCacheFilePath(resource_id,
                                           md5,
-                                          GetSubDirectoryType(*cache_entry),
+                                          GetSubDirectoryType(cache_entry),
                                           CACHED_FILE_LOCALLY_MODIFIED);
 
   // Since there's no need to move files, use |target_path| for both
   // |source_path| and |dest_path|, because ModifyCacheState only moves files
   // if source and destination are different.
   *error = ModifyCacheState(target_path,  // source
                             target_path,  // destination
                             file_operation_type,
                             symlink_path,
                             true /* create symlink */);
 }
 
 void GDataCache::ClearDirty(const std::string& resource_id,
                             const std::string& md5,
                             FileOperationType file_operation_type,
                             base::PlatformFileError* error) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
 
   // |md5| is the new .<md5> extension to rename the file to.
   // So, search for entry in cache without comparing md5.
-  scoped_ptr<GDataCacheEntry> cache_entry =
-      GetCacheEntry(resource_id, std::string());
+  GDataCacheEntry cache_entry;
 
   // Clearing a dirty file means its entry and actual file blob must exist in
   // cache.
-  if (!cache_entry.get() || !cache_entry->IsPresent()) {
+  if (!GetCacheEntry(resource_id, std::string(), &cache_entry) ||
+      !cache_entry.IsPresent()) {
     LOG(WARNING) << "Can't clear dirty state of a file that wasn't cached: "
                  << "res_id=" << resource_id
                  << ", md5=" << md5;
     *error = base::PLATFORM_FILE_ERROR_NOT_FOUND;
     return;
   }
 
   // If a file is not dirty (it should have been marked dirty via
   // MarkDirtyInCache), clearing its dirty state is an invalid operation.
-  if (!cache_entry->IsDirty()) {
+  if (!cache_entry.IsDirty()) {
     LOG(WARNING) << "Can't clear dirty state of a non-dirty file: res_id="
                  << resource_id
                  << ", md5=" << md5;
     *error = base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
     return;
   }
 
   // File must be dirty and hence in persistent dir.
-  DCHECK(cache_entry->IsPersistent());
+  DCHECK(cache_entry.IsPersistent());
 
   // Get the current path of the file in cache.
   FilePath source_path = GetCacheFilePath(resource_id,
                                           md5,
-                                          GetSubDirectoryType(*cache_entry),
+                                          GetSubDirectoryType(cache_entry),
                                           CACHED_FILE_LOCALLY_MODIFIED);
 
   // Determine destination path.
   // If file is pinned, move it to persistent dir with .md5 extension;
   // otherwise, move it to tmp dir with .md5 extension.
   const CacheSubDirectoryType sub_dir_type =
-      cache_entry->IsPinned() ? CACHE_TYPE_PERSISTENT : CACHE_TYPE_TMP;
+      cache_entry.IsPinned() ? CACHE_TYPE_PERSISTENT : CACHE_TYPE_TMP;
   FilePath dest_path = GetCacheFilePath(resource_id,
                                         md5,
                                         sub_dir_type,
                                         CACHED_FILE_FROM_SERVER);
 
   // Delete symlink in outgoing dir.
   FilePath symlink_path = GetCacheFilePath(resource_id,
                                            std::string(),
                                            CACHE_TYPE_OUTGOING,
                                            CACHED_FILE_FROM_SERVER);
 
   *error = ModifyCacheState(source_path,
                             dest_path,
                             file_operation_type,
                             symlink_path,
                             false /* don't create symlink */);
 
   // If file is pinned, update symlink in pinned dir.
-  if (*error == base::PLATFORM_FILE_OK && cache_entry->IsPinned()) {
+  if (*error == base::PLATFORM_FILE_OK && cache_entry.IsPinned()) {
     symlink_path = GetCacheFilePath(resource_id,
                                     std::string(),
                                     CACHE_TYPE_PINNED,
                                     CACHED_FILE_FROM_SERVER);
 
     // Since there's no moving of files here, use |dest_path| for both
     // |source_path| and |dest_path|, because ModifyCacheState only moves files
     // if source and destination are different.
     *error = ModifyCacheState(dest_path,  // source path
                               dest_path,  // destination path
                               file_operation_type,
                               symlink_path,
                               true /* create symlink */);
   }
 
   if (*error == base::PLATFORM_FILE_OK) {
     // Now that file operations have completed, update cache map.
-    GDataCacheEntry new_cache_entry(md5, cache_entry->cache_state());
+    GDataCacheEntry new_cache_entry(md5, cache_entry.cache_state());
     new_cache_entry.SetDirty(false);
     new_cache_entry.SetPersistent(sub_dir_type == CACHE_TYPE_PERSISTENT);
     metadata_->AddOrUpdateCacheEntry(resource_id, new_cache_entry);
   }
 }
 
 void GDataCache::Remove(const std::string& resource_id,
                         base::PlatformFileError* error) {
   AssertOnSequencedWorkerPool();
   DCHECK(error);
 
   // MD5 is not passed into RemoveCacheEntry because we would delete all
   // cache files corresponding to <resource_id> regardless of the md5.
   // So, search for entry in cache without taking md5 into account.
-  scoped_ptr<GDataCacheEntry> cache_entry =
-      GetCacheEntry(resource_id, std::string());
+  GDataCacheEntry cache_entry;
 
   // If entry doesn't exist or is dirty or mounted in cache, nothing to do.
-  if (!cache_entry.get() ||
-      cache_entry->IsDirty() ||
-      cache_entry->IsMounted()) {
+  const bool entry_found =
+      GetCacheEntry(resource_id, std::string(), &cache_entry);
+  if (!entry_found || cache_entry.IsDirty() || cache_entry.IsMounted()) {
     DVLOG(1) << "Entry is "
-             << (cache_entry.get() ?
-                 (cache_entry->IsDirty() ? "dirty" : "mounted") :
+             << (entry_found ?
+                 (cache_entry.IsDirty() ? "dirty" : "mounted") :
                  "non-existent")
              << " in cache, not removing";
     *error = base::PLATFORM_FILE_OK;
     return;
   }
 
   // Determine paths to delete all cache versions of |resource_id| in
   // persistent, tmp and pinned directories.
   std::vector<FilePath> paths_to_delete;
 
@@ skipping 86 matching lines @@
 }
 
 void GDataCache::GetCacheEntryHelper(const std::string& resource_id,
                                      const std::string& md5,
                                      bool* success,
                                      GDataCacheEntry* cache_entry) {
   AssertOnSequencedWorkerPool();
   DCHECK(success);
   DCHECK(cache_entry);
 
-  scoped_ptr<GDataCacheEntry> value(GetCacheEntry(resource_id, md5));
-  *success = value.get();
-  if (*success)
-    *cache_entry = *value;
+  *success = GetCacheEntry(resource_id, md5, cache_entry);
 }
 
 // static
 FilePath GDataCache::GetCacheRootPath(Profile* profile) {
   FilePath cache_base_path;
   chrome::GetUserCacheDirectory(profile->GetPath(), &cache_base_path);
   FilePath cache_root_path =
       cache_base_path.Append(chrome::kGDataCacheDirname);
   return cache_root_path.Append(kGDataCacheVersionDir);
 }
@@ skipping 38 matching lines @@
     const GDataCacheEntry& cache_entry) {
   return cache_entry.IsPersistent() ? CACHE_TYPE_PERSISTENT : CACHE_TYPE_TMP;
 }
 
 void SetFreeDiskSpaceGetterForTesting(FreeDiskSpaceGetterInterface* getter) {
   delete global_free_disk_getter_for_testing;  // Safe to delete NULL;
   global_free_disk_getter_for_testing = getter;
 }
 
 }  // namespace gdata