Use a BitArray in RuntimeCSSEnabled instead of a Vector<bool>

Source/wtf/BitVector.cpp

Index: Source/wtf/BitVector.cpp
diff --git a/Source/wtf/BitVector.cpp b/Source/wtf/BitVector.cpp
index 3a4588ecb43d6f8d476e9ff84b5e2bcdd9dae768..903794b2eee7d8a9f5a81ab766385675153cdf9b 100644
--- a/Source/wtf/BitVector.cpp
+++ b/Source/wtf/BitVector.cpp
@@ -73,6 +73,11 @@ void BitVector::clearAll()
         memset(outOfLineBits()->bits(), 0, byteCount(size()));
 }
 
+void BitVector::setAll()
+{
+    memset(bits(), 0xFF, byteCount(size()));
+}
+
 BitVector::OutOfLineBits* BitVector::OutOfLineBits::create(size_t numBits)
 {
     // Because of the way BitVector stores the pointer, memory tools