Rendering text-justify:distribute for 8 bit characters.

Source/core/platform/graphics/Font.cpp

Index: Source/core/platform/graphics/Font.cpp
diff --git a/Source/core/platform/graphics/Font.cpp b/Source/core/platform/graphics/Font.cpp
index 3ba67d93f3a28aaae6fdd7adb7ce6b4ed78e10a2..f08e1c078634a5c0b0f305c7871c955818e6c59e 100644
--- a/Source/core/platform/graphics/Font.cpp
+++ b/Source/core/platform/graphics/Font.cpp
@@ -601,30 +601,32 @@ bool Font::isCJKIdeographOrSymbol(UChar32 c)
     return isEndOfRange;
 }
 
-unsigned Font::expansionOpportunityCount(const LChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion)
+unsigned Font::expansionOpportunityCount(const LChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion, bool distributeJustification)
 {
     unsigned count = 0;
     if (direction == LTR) {
         for (size_t i = 0; i < length; ++i) {
-            if (treatAsSpace(characters[i])) {
+            if (treatAsSpace(characters[i]) || distributeJustification)
                 count++;
-                isAfterExpansion = true;
-            } else
-                isAfterExpansion = false;
         }
+        if (treatAsSpace(characters[length - 1]))
+            isAfterExpansion = true;
+        else
+            isAfterExpansion = false;
     } else {
         for (size_t i = length; i > 0; --i) {
-            if (treatAsSpace(characters[i - 1])) {
+            if (treatAsSpace(characters[i - 1]) || distributeJustification)
                 count++;
-                isAfterExpansion = true;
-            } else
-                isAfterExpansion = false;
         }
+        if (treatAsSpace(characters[0]))
+            isAfterExpansion = true;
+        else
+            isAfterExpansion = false;
     }
     return count;
 }
 
-unsigned Font::expansionOpportunityCount(const UChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion)
+unsigned Font::expansionOpportunityCount(const UChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion, bool distributeJustification)
 {
     static bool expandAroundIdeographs = canExpandAroundIdeographsInComplexText();
     unsigned count = 0;