Find In Page doesn't work properly when " " is searched

third_party/WebKit/Source/core/editing/iterators/SearchBuffer.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 396 matching lines @@
         }
         if (it.atBreak() && !buffer.atBreak()) {
             buffer.reachedBreak();
             goto tryAgain;
         }
     }
 
     return matchLength;
 }
 
-static const TextIteratorBehaviorFlags iteratorFlagsForFindPlainText = TextIteratorEntersTextControls | TextIteratorEntersOpenShadowRoots | TextIteratorDoesNotBreakAtReplacedElement;
+static const TextIteratorBehaviorFlags iteratorFlagsForFindPlainText = TextIteratorEntersTextControls | TextIteratorEntersOpenShadowRoots | TextIteratorDoesNotBreakAtReplacedElement | TextIteratorCollapseTrailingSpace;
 
 template <typename Strategy>
 static EphemeralRangeTemplate<Strategy> findPlainTextAlgorithm(const EphemeralRangeTemplate<Strategy>& inputRange, const String& target, FindOptions options)
 {
     // CharacterIterator requires layoutObjects to be up-to-date.
     if (!inputRange.startPosition().inDocument())
         return EphemeralRangeTemplate<Strategy>();
     ASSERT(inputRange.startPosition().document() == inputRange.endPosition().document());
 
     // FIXME: Reduce the code duplication with above (but how?).
@@ skipping 17 matching lines @@
 {
     return findPlainTextAlgorithm<EditingStrategy>(inputRange, target, options);
 }
 
 EphemeralRangeInComposedTree findPlainText(const EphemeralRangeInComposedTree& inputRange, const String& target, FindOptions options)
 {
     return findPlainTextAlgorithm<EditingInComposedTreeStrategy>(inputRange, target, options);
 }
 
 } // namespace blink