NTP: Rename mojo methods, fixing a TODO

chrome/common/instant.mojom

Index: chrome/common/instant.mojom
diff --git a/chrome/common/instant.mojom b/chrome/common/instant.mojom
index 3935339e2d3330fa915abbdee2e9be117069f655..a9f0fdd2043d81758ca1e3df73bd9f660eee7e44 100644
--- a/chrome/common/instant.mojom
+++ b/chrome/common/instant.mojom
@@ -25,15 +25,14 @@ interface Instant {
   // Tells InstantExtended to set the omnibox focus state.
   FocusOmnibox(int32 page_seq_no, OmniboxFocusState state);
 
-  // TODO(treib): Remove the SearchBox prefix from these three methods.
   // Tells InstantExtended to delete a most visited item.
-  SearchBoxDeleteMostVisitedItem(int32 page_seq_no, url.mojom.Url url);
+  DeleteMostVisitedItem(int32 page_seq_no, url.mojom.Url url);
 
   // Tells InstantExtended to undo all most visited item deletions.
-  SearchBoxUndoAllMostVisitedDeletions(int32 page_seq_no);
+  UndoAllMostVisitedDeletions(int32 page_seq_no);
 
   // Tells InstantExtended to undo one most visited item deletion.
-  SearchBoxUndoMostVisitedDeletion(int32 page_seq_no, url.mojom.Url url);
+  UndoMostVisitedDeletion(int32 page_seq_no, url.mojom.Url url);
 
   // Logs events from InstantExtended New Tab Pages.
   LogEvent(int32 page_seq_no,