Remove CloseFile from FileSystem.

chrome/browser/chromeos/drive/fake_file_system.cc

Index: chrome/browser/chromeos/drive/fake_file_system.cc
diff --git a/chrome/browser/chromeos/drive/fake_file_system.cc b/chrome/browser/chromeos/drive/fake_file_system.cc
index 7f49b9cbaaeeb9940cc5b6b90686822ee12e9310..234aadb7ffcbbf0dbfa22b2d610e6760f120d2a8 100644
--- a/chrome/browser/chromeos/drive/fake_file_system.cc
+++ b/chrome/browser/chromeos/drive/fake_file_system.cc
@@ -74,11 +74,6 @@ void FakeFileSystem::OpenFile(const base::FilePath& file_path,
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
-void FakeFileSystem::CloseFile(const base::FilePath& file_path,
-                               const FileOperationCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-}
-
 void FakeFileSystem::Copy(const base::FilePath& src_file_path,
                           const base::FilePath& dest_file_path,
                           const FileOperationCallback& callback) {
@@ -210,7 +205,7 @@ void FakeFileSystem::GetMetadata(
 
 void FakeFileSystem::MarkCacheFileAsMounted(
     const base::FilePath& drive_file_path,
-    const OpenFileCallback& callback) {
+    const MarkMountedCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }