Cleanup: Correctly spell success(ful).

ios/chrome/browser/find_in_page/js_findinpage_manager.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/find_in_page/js_findinpage_manager.h"
 
 #include <string>
 
 #import "base/ios/weak_nsobject.h"
 #include "base/json/json_reader.h"
@@ skipping 42 matching lines @@
 
 }  // namespace
 
 @interface JsFindinpageManager ()
 // Update find in page model with results, return true if fip completes or
 // false if still pending and requires pumping. If |point| is not nil, it will
 // contain the scroll position upon return.
 - (BOOL)processFindInPageResult:(NSString*)result
                  scrollPosition:(CGPoint*)point;
 // Updates find in page model with results. Calls |completionHandler| with the
-// the result of the processing and the new scroll position if successfull. If
+// the result of the processing and the new scroll position if successful. If
 // |completionHandler| is called with NO, further pumping is required.
 // |completionHandler| cannot be nil.
 - (void)processFindInPagePumpResult:(NSString*)result
                   completionHandler:(void (^)(BOOL, CGPoint))completionHandler;
 // Helper functions to extract FindInPageEntry from JSON.
 - (FindInPageEntry)findInPageEntryForJson:(NSString*)jsonStr;
 - (FindInPageEntry)entryForListValue:(base::ListValue*)position;
 // Executes |script| which is a piece of JavaScript to move to the next or
 // previous element in the page and executes |completionHandler| after moving
 // with the new scroll position passed in.
@@ skipping 188 matching lines @@
 
 - (NSString*)scriptPath {
   return @"find_in_page";
 }
 
 - (NSString*)presenceBeacon {
   return kFindInPageBeacon;
 }
 
 @end