Rename OperationObserver to OperationDelegate

chrome/browser/chromeos/drive/file_system/touch_operation.cc

Index: chrome/browser/chromeos/drive/file_system/touch_operation.cc
diff --git a/chrome/browser/chromeos/drive/file_system/touch_operation.cc b/chrome/browser/chromeos/drive/file_system/touch_operation.cc
index ee7276d68d6ca2034e409711ebe77346f5ac3e5c..6c3940c0af5e22449a7194b16c73a2086c7c9072 100644
--- a/chrome/browser/chromeos/drive/file_system/touch_operation.cc
+++ b/chrome/browser/chromeos/drive/file_system/touch_operation.cc
@@ -10,7 +10,7 @@
 #include "base/time/time.h"
 #include "chrome/browser/chromeos/drive/file_change.h"
 #include "chrome/browser/chromeos/drive/file_errors.h"
-#include "chrome/browser/chromeos/drive/file_system/operation_observer.h"
+#include "chrome/browser/chromeos/drive/file_system/operation_delegate.h"
 #include "chrome/browser/chromeos/drive/resource_metadata.h"
 #include "content/public/browser/browser_thread.h"
 
@@ -46,10 +46,10 @@ FileError UpdateLocalState(internal::ResourceMetadata* metadata,
 }  // namespace
 
 TouchOperation::TouchOperation(base::SequencedTaskRunner* blocking_task_runner,
-                               OperationObserver* observer,
+                               OperationDelegate* delegate,
                                internal::ResourceMetadata* metadata)
     : blocking_task_runner_(blocking_task_runner),
-      observer_(observer),
+      delegate_(delegate),
       metadata_(metadata),
       weak_ptr_factory_(this) {
 }
@@ -101,8 +101,8 @@ void TouchOperation::TouchFileAfterUpdateLocalState(
       FileChange::ADD_OR_UPDATE);
 
   if (error == FILE_ERROR_OK) {
-    observer_->OnFileChangedByOperation(changed_files);
-    observer_->OnEntryUpdatedByOperation(*local_id);
+    delegate_->OnFileChangedByOperation(changed_files);
+    delegate_->OnEntryUpdatedByOperation(*local_id);
   }
   callback.Run(error);
 }