Remove drive::file_system::Operations.

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

Index: chrome/browser/chromeos/drive/file_system/search_operation.cc
diff --git a/chrome/browser/chromeos/drive/file_system/search_operation.cc b/chrome/browser/chromeos/drive/file_system/search_operation.cc
index 59fcff38bef7e30ed58b5417be47396a383a2462..c1dd91788f87462155402f8f4db582775b9c1fcd 100644
--- a/chrome/browser/chromeos/drive/file_system/search_operation.cc
+++ b/chrome/browser/chromeos/drive/file_system/search_operation.cc
@@ -83,7 +83,7 @@ SearchOperation::~SearchOperation() {
 
 void SearchOperation::Search(const std::string& search_query,
                              const GURL& next_feed,
-                             const SearchOperationCallback& callback) {
+                             const SearchCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
@@ -103,7 +103,7 @@ void SearchOperation::Search(const std::string& search_query,
 }
 
 void SearchOperation::SearchAfterGetResourceList(
-    const SearchOperationCallback& callback,
+    const SearchCallback& callback,
     google_apis::GDataErrorCode gdata_error,
     scoped_ptr<google_apis::ResourceList> resource_list) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
@@ -148,7 +148,7 @@ void SearchOperation::SearchAfterGetResourceList(
 }
 
 void SearchOperation::SearchAfterRefreshEntry(
-    const SearchOperationCallback& callback,
+    const SearchCallback& callback,
     const GURL& next_feed,
     scoped_ptr<std::vector<SearchResultInfo> > result,
     FileError error) {