DateComponents shouldn't use bloatedCharacters

Source/core/html/WeekInputType.cpp

Index: Source/core/html/WeekInputType.cpp
diff --git a/Source/core/html/WeekInputType.cpp b/Source/core/html/WeekInputType.cpp
index 64ad701f457acc1d72ee78cbd67ebe6215df71e1..50cfd74e250338470389fd2d78150fcc01b01c5c 100644
--- a/Source/core/html/WeekInputType.cpp
+++ b/Source/core/html/WeekInputType.cpp
@@ -82,11 +82,11 @@ StepRange WeekInputType::createStepRange(AnyStepHandling anyStepHandling) const
     return StepRange(stepBase, minimum, maximum, step, stepDescription);
 }
 
-bool WeekInputType::parseToDateComponentsInternal(const UChar* characters, unsigned length, DateComponents* out) const
+bool WeekInputType::parseToDateComponentsInternal(const String& string, DateComponents* out) const
 {
     ASSERT(out);
     unsigned end;
-    return out->parseWeek(characters, length, 0, end) && end == length;
+    return out->parseWeek(string, 0, end) && end == string.length();
 }
 
 bool WeekInputType::setMillisecondToDateComponents(double value, DateComponents* date) const