text-justify fix for Chinese and Japanese

Source/platform/fonts/Character.cpp

Index: Source/platform/fonts/Character.cpp
diff --git a/Source/platform/fonts/Character.cpp b/Source/platform/fonts/Character.cpp
index 9ae36fc83ca78d1ffee41b510d576eb556914cdd..8a1308f8fd88bf2353298a13bb72be9df3380d74 100644
--- a/Source/platform/fonts/Character.cpp
+++ b/Source/platform/fonts/Character.cpp
@@ -378,6 +378,13 @@ unsigned Character::expansionOpportunityCount(const UChar* characters, size_t le
                 character = U16_GET_SUPPLEMENTARY(character, characters[i + 1]);
                 i++;
             }
+            if (textJustify == TextJustify::TextJustifyAuto && isCJKIdeographOrSymbol(character)) {
+                if (!isAfterExpansion)
+                    count++;
+                count++;
+                isAfterExpansion = true;
+                continue;
+            }
             isAfterExpansion = false;
         }
     } else {
@@ -392,6 +399,13 @@ unsigned Character::expansionOpportunityCount(const UChar* characters, size_t le
                 character = U16_GET_SUPPLEMENTARY(characters[i - 2], character);
                 i--;
             }
+            if (textJustify == TextJustify::TextJustifyAuto && isCJKIdeographOrSymbol(character)) {
+                if (!isAfterExpansion)
+                    count++;
+                count++;
+                isAfterExpansion = true;
+                continue;
+            }
             isAfterExpansion = false;
         }
     }