Remove an extra space added before iframe

third_party/WebKit/Source/core/editing/iterators/TextIterator.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 692 matching lines @@
     }
 
     if (m_behavior & TextIteratorCollapseTrailingSpace) {
         if (m_lastTextNode) {
             String str = m_lastTextNode->layoutObject()->text();
             if (m_lastTextNodeEndedWithCollapsedSpace && m_offset > 0 && str[m_offset - 1] == ' ') {
                 spliceBuffer(spaceCharacter, Strategy::parent(*m_lastTextNode), m_lastTextNode, 1, 1);
                 return false;
             }
         }
-    } else if (m_lastTextNodeEndedWithCollapsedSpace) {
+    } else if (m_lastTextNodeEndedWithCollapsedSpace && !isHTMLIFrameElement(toHTMLElement(*m_node))) {
         spliceBuffer(spaceCharacter, Strategy::parent(*m_lastTextNode), m_lastTextNode, 1, 1);
         return false;
     }
 
     if (entersTextControls() && layoutObject->isTextControl()) {
         // The shadow tree should be already visited.
         return true;
     }
 
     if (emitsCharactersBetweenAllVisiblePositions()) {
@@ skipping 479 matching lines @@
 
 String plainText(const EphemeralRangeInFlatTree& range, TextIteratorBehaviorFlags behavior)
 {
     return createPlainText<EditingInFlatTreeStrategy>(range, behavior);
 }
 
 template class CORE_TEMPLATE_EXPORT TextIteratorAlgorithm<EditingStrategy>;
 template class CORE_TEMPLATE_EXPORT TextIteratorAlgorithm<EditingInFlatTreeStrategy>;
 
 } // namespace blink