[es6] implement spread calls

src/full-codegen.cc

Index: src/full-codegen.cc
diff --git a/src/full-codegen.cc b/src/full-codegen.cc
index 327230e75d457eca7be084e9407941476bf1ad97..d70ab80d2cc7999ef5cb99d73078404dcfca28a7 100644
--- a/src/full-codegen.cc
+++ b/src/full-codegen.cc
@@ -288,6 +288,9 @@ void BreakableStatementChecker::VisitCompareOperation(CompareOperation* expr) {
 }
 
 
+void BreakableStatementChecker::VisitSpread(Spread* expr) { UNREACHABLE(); }
+
+
 void BreakableStatementChecker::VisitThisFunction(ThisFunction* expr) {
 }
 
@@ -1666,6 +1669,9 @@ void FullCodeGenerator::ExitTryBlock(int index) {
 }
 
 
+void FullCodeGenerator::VisitSpread(Spread* expr) { UNREACHABLE(); }
+
+
 FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit(
     int* stack_depth, int* context_length) {
   // The macros used here must preserve the result register.