Add Cast() to Boolean

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index f0c105cffc9817c8e302b9b06f92b771eec3246d..c774c9491757cfe0601021e51d0e7d62001bfee9 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -2946,6 +2946,14 @@ void v8::Function::CheckCast(Value* that) {
 }
 
 
+void v8::Boolean::CheckCast(v8::Value* that) {
+  i::Handle<i::Object> obj = Utils::OpenHandle(that);
+  Utils::ApiCheck(obj->IsBoolean(),
+                  "v8::Boolean::Cast()",
+                  "Could not convert to boolean");
+}
+
+
 void v8::Name::CheckCast(v8::Value* that) {
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   Utils::ApiCheck(obj->IsName(),