Limit optimized LayoutBlockFlowLine width computation to 8bit

third_party/WebKit/LayoutTests/platform/mac-mac10.11/fast/writing-mode/japanese-rl-text-expected.txt

Index: third_party/WebKit/LayoutTests/platform/mac-mac10.11/fast/writing-mode/japanese-rl-text-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/mac-mac10.11/fast/writing-mode/japanese-rl-text-expected.txt b/third_party/WebKit/LayoutTests/platform/mac-mac10.11/fast/writing-mode/japanese-rl-text-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..10f00dda15c7c643921df69e9117b3c3e88eb62c
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/platform/mac-mac10.11/fast/writing-mode/japanese-rl-text-expected.txt
@@ -0,0 +1,17 @@
+layer at (0,0) size 800x600
+  LayoutView at (0,0) size 800x600
+layer at (391,0) size 409x600
+  LayoutBlockFlow {HTML} at (0,0) size 409x600 [border: (10px solid #800000)]
+    LayoutBlockFlow {BODY} at (18,18) size 373x564 [border: (5px solid #000000)]
+      LayoutText {#text} at (10,5) size 352x553
+        text run at (10,5) width 534: "\x{305B}\x{3063}\x{304B}\x{304F}\x{898B}\x{3064}\x{3051}\x{305F}\x{3059}\x{3070}\x{3089}\x{3057}\x{3044}\x{8A18}\x{4E8B}\x{304C}\x{3069}\x{3053}\x{306B}\x{3042}\x{3063}\x{305F}\x{304B}\x{5FD8}\x{308C}"
+        text run at (43,5) width 534: "\x{3066}\x{3057}\x{307E}\x{3063}\x{305F}\x{7D4C}\x{9A13}\x{306F}\x{3042}\x{308A}\x{307E}\x{3059}\x{304B}\x{306A}\x{3089}\x{30BF}\x{30A4}\x{30C8}\x{30EB}\x{3068}\x{30A2}\x{30C9}\x{30EC}\x{30B9}\x{3060}"
+        text run at (76,5) width 532: "\x{3051}\x{3067}\x{306A}\x{304F}\x{3001}\x{8A2A}\x{554F}\x{3057}\x{305F}\x{30A6}\x{30A7}\x{30D6}\x{30DA}\x{30FC}\x{30B8}\x{306E}\x{30B3}\x{30F3}\x{30C6}\x{30F3}\x{30C4}\x{304B}\x{3089}\x{3082}\x{691C}"
+        text run at (109,5) width 553: "\x{7D22}\x{3059}\x{308B}\x{3053}\x{3068}\x{304C}\x{3067}\x{304D}\x{307E}\x{3059}\x{3002}\x{305B}\x{3063}\x{304B}\x{304F}\x{898B}\x{3064}\x{3051}\x{305F}\x{3059}\x{3070}\x{3089}\x{3057}\x{3044}\x{8A18}\x{4E8B}"
+        text run at (142,5) width 541: "\x{304C}\x{3069}\x{3053}\x{306B}\x{3042}\x{3063}\x{305F}\x{304B}\x{5FD8}\x{308C}\x{3066}\x{3057}\x{307E}\x{3063}\x{305F}\x{7D4C}\x{9A13}\x{306F}\x{3042}\x{308A}\x{307E}\x{3059}\x{304B} \x{306A}\x{3089}"
+        text run at (175,5) width 532: "\x{30BF}\x{30A4}\x{30C8}\x{30EB}\x{3068}\x{30A2}\x{30C9}\x{30EC}\x{30B9}\x{3060}\x{3051}\x{3067}\x{306A}\x{304F}\x{3001}\x{8A2A}\x{554F}\x{3057}\x{305F}\x{30A6}\x{30A7}\x{30D6}\x{30DA}\x{30FC}\x{30B8}"
+        text run at (208,5) width 553: "\x{306E}\x{30B3}\x{30F3}\x{30C6}\x{30F3}\x{30C4}\x{304B}\x{3089}\x{3082}\x{691C}\x{7D22}\x{3059}\x{308B}\x{3053}\x{3068}\x{304C}\x{3067}\x{304D}\x{307E}\x{3059}\x{3002}\x{8A2A}\x{554F}\x{3057}\x{305F}\x{30A6}"
+        text run at (241,5) width 551: "\x{30A7}\x{30D6}\x{30DA}\x{30FC}\x{30B8}\x{306E}\x{30B3}\x{30F3}\x{30C6}\x{30F3}\x{30C4}\x{304B}\x{3089}\x{3082}\x{691C}\x{7D22}\x{3059}\x{308B}\x{3053}\x{3068}\x{304C}\x{3067}\x{304D}\x{307E}\x{3059}\x{3002}"
+        text run at (274,5) width 534: "\x{305B}\x{3063}\x{304B}\x{304F}\x{898B}\x{3064}\x{3051}\x{305F}\x{3059}\x{3070}\x{3089}\x{3057}\x{3044}\x{8A18}\x{4E8B}\x{304C}\x{3069}\x{3053}\x{306B}\x{3042}\x{3063}\x{305F}\x{304B}\x{5FD8}\x{308C}"
+        text run at (307,5) width 541: "\x{3066}\x{3057}\x{307E}\x{3063}\x{305F}\x{7D4C}\x{9A13}\x{306F}\x{3042}\x{308A}\x{307E}\x{3059}\x{304B} \x{306A}\x{3089}\x{30BF}\x{30A4}\x{30C8}\x{30EB}\x{3068}\x{30A2}\x{30C9}\x{30EC}\x{30B9}\x{3060}"
+        text run at (340,5) width 150: "\x{3051}\x{3067}\x{306A}\x{304F}\x{3001}\x{8A2A}\x{554F}"