Add a plain space instead of   between text nodes

third_party/WebKit/Source/core/editing/EditingUtilities.h

 /*
  * Copyright (C) 2004, 2006, 2008 Apple 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 329 matching lines @@
 }
 
 inline bool isAmbiguousBoundaryCharacter(UChar character)
 {
     // These are characters that can behave as word boundaries, but can appear within words.
     // If they are just typed, i.e. if they are immediately followed by a caret, we want to delay text checking until the next character has been typed.
     // FIXME: this is required until 6853027 is fixed and text checking can do this for us.
     return character == '\'' || character == rightSingleQuotationMarkCharacter || character == hebrewPunctuationGershayimCharacter;
 }
 
-String stringWithRebalancedWhitespace(const String&, bool startIsStartOfParagraph, bool endIsEndOfParagraph);
+String stringWithRebalancedWhitespace(const String&, bool startIsStartOfParagraph, bool endIsEndOfParagraph, bool nextTextSibling = false);

[yosin_UTC9, 2016/07/25 07:42:23]

nit: to follow other parameter names, |nextSiblingIsTextNode| is better.

 const String& nonBreakingSpaceString();
 
 // -------------------------------------------------------------------------
 // Events
 // -------------------------------------------------------------------------
 
 // Functions dispatch InputEvent
 DispatchEventResult dispatchBeforeInputInsertText(EventTarget*, const String& data);
 DispatchEventResult dispatchBeforeInputFromComposition(EventTarget*, InputEvent::InputType, const String& data, InputEvent::EventCancelable);
 DispatchEventResult dispatchBeforeInputEditorCommand(EventTarget*, InputEvent::InputType, const String& data, const RangeVector*);
 
 } // namespace blink
 
 #endif