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 f49d88fa5cb99062c29e0146ace994920cc096a7..44a8a9a4f722673085e570e5ceb0f30edebd2670 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 shouldEmitNBSPbeforeEnd)
 {
     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 && shouldEmitNBSPbeforeEnd)) {
             rebalancedString.append(noBreakSpaceCharacter);
             previousCharacterWasSpace = false;
         } else {