Add a plain space instead of   between text nodes

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

Index: third_party/WebKit/Source/core/editing/EditingUtilities.cpp
diff --git a/third_party/WebKit/Source/core/editing/EditingUtilities.cpp b/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
index e077e2048c4e42b2027975af9bfceb7b16829c42..c87470ed4cc320fc0e983bf79a1d58eb3f85df88 100644
--- a/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
+++ b/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
@@ -851,7 +851,7 @@ TextDirection primaryDirectionOf(const Node& node)
     return primaryDirection;
 }
 
-String stringWithRebalancedWhitespace(const String& string, bool startIsStartOfParagraph, bool endIsEndOfParagraph)
+String stringWithRebalancedWhitespace(const String& string, bool startIsStartOfParagraph, bool endIsEndOfParagraph, bool nextTextSibling)
 {
     unsigned length = string.length();
 
@@ -867,7 +867,8 @@ String stringWithRebalancedWhitespace(const String& string, bool startIsStartOfP
             continue;
         }
 
-        if (previousCharacterWasSpace || (!i && startIsStartOfParagraph) || (i + 1 == length && endIsEndOfParagraph)) {
+        // We need to ensure there is no next sibling text node. See http://crbug.com/310149
+        if (previousCharacterWasSpace || (!i && startIsStartOfParagraph) || (i + 1 == length && endIsEndOfParagraph && !nextTextSibling)) {

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

Should we insert U+0020 instead of U+00A0 when previous sibling is Text node?

[joone, 2016/07/26 04:16:34]

I'm not sure. In this case, the space is inserted at the end of the first text
node. Anyway, we need to find such a case.

             rebalancedString.append(noBreakSpaceCharacter);
             previousCharacterWasSpace = false;
         } else {