drive: Remove FileCache::GetCacheEntry

chrome/browser/chromeos/drive/file_cache.h

Index: chrome/browser/chromeos/drive/file_cache.h
diff --git a/chrome/browser/chromeos/drive/file_cache.h b/chrome/browser/chromeos/drive/file_cache.h
index 2a18172516d093efcd09463f0ee2e89cd69bbe75..c85be5daf1469a7f255661f5958522d05020b11a 100644
--- a/chrome/browser/chromeos/drive/file_cache.h
+++ b/chrome/browser/chromeos/drive/file_cache.h
@@ -21,8 +21,6 @@ class SequencedTaskRunner;
 
 namespace drive {
 
-class FileCacheEntry;
-
 namespace internal {
 
 // Interface class used for getting the free disk space. Tests can inject an
@@ -66,10 +64,6 @@ class FileCache {
   // Can be called on any thread.
   bool IsUnderFileCacheDirectory(const base::FilePath& path) const;
 
-  // Gets the cache entry for file corresponding to |id| and returns true if
-  // entry exists in cache map.
-  FileError GetCacheEntry(const std::string& id, FileCacheEntry* entry);
-
   // Frees up disk space to store a file with |num_bytes| size content, while
   // keeping cryptohome::kMinFreeSpaceInBytes bytes on the disk, if needed.
   // Returns true if we successfully manage to have enough space, otherwise