chromeos: Stop returning scoped_ptr from GDataCache::GetCacheEntry

chrome/browser/chromeos/gdata/gdata_cache.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 CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 321 matching lines @@
   // Does the following:
   // - remove all delete stale cache versions corresponding to |resource_id| in
   //   persistent, tmp and pinned directories
   // - remove entry corresponding to |resource_id| from cache map.
   void RemoveOnUIThread(const std::string& resource_id,
                         const CacheOperationCallback& callback);
 
   // Utility method to call Initialize on UI thread.
   void RequestInitializeOnUIThread();
 
-  // Returns the cache entry for file corresponding to |resource_id| and |md5|
-  // if entry exists in cache map.  Otherwise, returns NULL.
+  // Gets the cache entry for file corresponding to |resource_id| and |md5|
+  // and returns true if entry exists in cache map.  Otherwise, returns false.
   // |md5| can be empty if only matching |resource_id| is desired, which may
   // happen when looking for pinned entries where symlinks' filenames have no
   // extension and hence no md5.
-  scoped_ptr<CacheEntry> GetCacheEntry(const std::string& resource_id,
-                                       const std::string& md5);
+  bool GetCacheEntry(const std::string& resource_id,
+                     const std::string& md5,
+                     CacheEntry* entry);
 
   // Factory methods for GDataCache.
   // |pool| and |sequence_token| are used to assert that the functions are
   // called on the right sequenced worker pool with the right sequence token.
   //
   // For testing, the thread assertion can be disabled by passing NULL and
   // the default value of SequenceToken.
   static GDataCache* CreateGDataCacheOnUIThread(
       const FilePath& cache_root_path,
       base::SequencedWorkerPool* pool,
@@ skipping 167 matching lines @@
 };
 
 // Sets the free disk space getter for testing.
 // The existing getter is deleted.
 void SetFreeDiskSpaceGetterForTesting(
     FreeDiskSpaceGetterInterface* getter);
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_H_