Removed limitation on searching frames for the same string prefix.

third_party/WebKit/Source/web/TextFinder.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 208 matching lines @@
   // The index of the active match for the current frame.
   int m_activeMatchIndex;
 
   // The scoping effort can time out and we need to keep track of where we
   // ended our last search so we can continue from where we left of.
   //
   // This range is collapsed to the end position of the last successful
   // search; the new search should start from this position.
   Member<Range> m_resumeScopingFromRange;
 
-  // Keeps track of the last string this frame searched for. This is used for
-  // short-circuiting searches in the following scenarios: When a frame has
-  // been searched and returned 0 results, we don't need to search that frame
-  // again if the user is just adding to the search (making it more specific).
-  WTF::String m_lastSearchString;
-
   // Keeps track of how many matches this frame has found so far, so that we
-  // don't lose count between scoping efforts, and is also used (in conjunction
-  // with m_lastSearchString) to figure out if we need to search the frame
-  // again.
+  // don't lose count between scoping efforts.
   int m_lastMatchCount;
 
   // This variable keeps a cumulative total of matches found so far in this
   // frame, and is only incremented by calling IncreaseMatchCount.
   int m_totalMatchCount;
 
   // Keeps track of whether the frame is currently scoping (being searched for
   // matches).
   bool m_frameScoping;
 
@@ skipping 20 matching lines @@
   IntSize m_contentsSizeForCurrentFindMatchRects;
 
   // This flag is used by the scoping effort to determine if we need to figure
   // out which rectangle is the active match. Once we find the active
   // rectangle we clear this flag.
   bool m_locatingActiveRect;
 
   // Keeps track of whether there is an scoping effort ongoing in the frame.
   bool m_scopingInProgress;
 
-  // Keeps track of whether the last find request completed its scoping effort
-  // without finding any matches in this frame.
-  bool m_lastFindRequestCompletedWithNoMatches;
-
   // Determines if the rects in the find-in-page matches cache of this frame
   // are invalid and should be recomputed.
   bool m_findMatchRectsAreValid;
 };
 
 }  // namespace blink
 
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::TextFinder::FindMatch);
 
 #endif  // TextFinder_h