Implement Math.tan in generated code.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index d200a1e88b8a51959641e3a616a79f80e8c6c3c4..5c0703bc37434ea91b475990e4f09349a596b2c2 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -6649,6 +6649,18 @@ void HGraphBuilder::GenerateMathCos(CallRuntime* call) {
 }
 
 
+void HGraphBuilder::GenerateMathTan(CallRuntime* call) {
+  ASSERT_EQ(1, call->arguments()->length());
+  CHECK_ALIVE(VisitArgumentList(call->arguments()));
+  HValue* context = environment()->LookupContext();
+  HCallStub* result =
+      new(zone()) HCallStub(context, CodeStub::TranscendentalCache, 1);
+  result->set_transcendental_type(TranscendentalCache::TAN);
+  Drop(1);
+  return ast_context()->ReturnInstruction(result, call->id());
+}
+
+
 void HGraphBuilder::GenerateMathLog(CallRuntime* call) {
   ASSERT_EQ(1, call->arguments()->length());
   CHECK_ALIVE(VisitArgumentList(call->arguments()));