cocoa: Get rid of an unused wstring floating around BookmarkAllTabsController.

chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
index 3fb3b715d2468aeb49cb3ab9df0fd6ba69ed783b..7dd4e07adf14ef0699985ff3cf83811958a2cbf7 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
@@ -59,9 +59,6 @@ using content::WebContents;
 // folder for the tabs and then the bookmarks in that new folder.
 // Returns a BOOL as an NSNumber indicating that the commit may proceed.
 - (NSNumber*)didCommit {
-  NSString* name = [[self displayName] stringByTrimmingCharactersInSet:
-                    [NSCharacterSet newlineCharacterSet]];
-  std::wstring newTitle = base::SysNSStringToWide(name);
   const BookmarkNode* newParentNode = [self selectedNode];
   if (!newParentNode)
     return [NSNumber numberWithBool:NO];