Rename OperationObserver to OperationDelegate

chrome/browser/chromeos/drive/file_system/move_operation.h

Index: chrome/browser/chromeos/drive/file_system/move_operation.h
diff --git a/chrome/browser/chromeos/drive/file_system/move_operation.h b/chrome/browser/chromeos/drive/file_system/move_operation.h
index c49b4e5eef75137f10e777d0fcf4a98cee04aa90..e572f286a005b4a3b3da06416264b66db646da30 100644
--- a/chrome/browser/chromeos/drive/file_system/move_operation.h
+++ b/chrome/browser/chromeos/drive/file_system/move_operation.h
@@ -34,14 +34,14 @@ class ResourceMetadata;
 
 namespace file_system {
 
-class OperationObserver;
+class OperationDelegate;
 
 // This class encapsulates the drive Move function.  It is responsible for
 // updating the local metadata entry.
 class MoveOperation {
  public:
   MoveOperation(base::SequencedTaskRunner* blocking_task_runner,
-                OperationObserver* observer,
+                OperationDelegate* delegate,
                 internal::ResourceMetadata* metadata);
   ~MoveOperation();
 
@@ -61,7 +61,7 @@ class MoveOperation {
                                  FileError error);
 
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
-  OperationObserver* observer_;
+  OperationDelegate* delegate_;
   internal::ResourceMetadata* metadata_;
 
   // Note: This should remain the last member so it'll be destroyed and