[builtins] Pass NotNullOrUndefined to ToPrimitive calls.

For calls from ToPrimitive we already now that the receiver cannot be
null or undefined, since a property lookup succeeded before the call,
which would have thrown an exception in case of null or undefined.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2649093002
Cr-Commit-Position: refs/heads/master@{#42589}

src/builtins/builtins-conversion.cc

@@ -24,6 +24,7 @@ Handle<Code> Builtins::NonPrimitiveToPrimitive(ToPrimitiveHint hint) {
 }
 
 namespace {
+
 // ES6 section 7.1.1 ToPrimitive ( input [ , PreferredType ] )
 void Generate_NonPrimitiveToPrimitive(CodeStubAssembler* assembler,
                                       ToPrimitiveHint hint) {
@@ -52,7 +53,8 @@ void Generate_NonPrimitiveToPrimitive(CodeStubAssembler* assembler,
   {
     // Invoke the {exotic_to_prim} method on the {input} with a string
     // representation of the {hint}.
-    Callable callable = CodeFactory::Call(assembler->isolate());
+    Callable callable = CodeFactory::Call(
+        assembler->isolate(), ConvertReceiverMode::kNotNullOrUndefined);
     Node* hint_string = assembler->HeapConstant(
         assembler->factory()->ToPrimitiveHintString(hint));
     Node* result = assembler->CallJS(callable, context, exotic_to_prim, input,
@@ -93,7 +95,8 @@ void Generate_NonPrimitiveToPrimitive(CodeStubAssembler* assembler,
     assembler->TailCallStub(callable, context, input);
   }
 }
-}  // anonymous namespace
+
+}  // namespace
 
 void Builtins::Generate_NonPrimitiveToPrimitive_Default(
     compiler::CodeAssemblerState* state) {
@@ -221,6 +224,7 @@ Handle<Code> Builtins::OrdinaryToPrimitive(OrdinaryToPrimitiveHint hint) {
 }
 
 namespace {
+
 // 7.1.1.1 OrdinaryToPrimitive ( O, hint )
 void Generate_OrdinaryToPrimitive(CodeStubAssembler* assembler,
                                   OrdinaryToPrimitiveHint hint) {
@@ -263,7 +267,8 @@ void Generate_OrdinaryToPrimitive(CodeStubAssembler* assembler,
     assembler->Bind(&if_methodiscallable);
     {
       // Call the {method} on the {input}.
-      Callable callable = CodeFactory::Call(assembler->isolate());
+      Callable callable = CodeFactory::Call(
+          assembler->isolate(), ConvertReceiverMode::kNotNullOrUndefined);
       Node* result = assembler->CallJS(callable, context, method, input);
       var_result.Bind(result);
 
@@ -287,7 +292,8 @@ void Generate_OrdinaryToPrimitive(CodeStubAssembler* assembler,
   assembler->Bind(&return_result);
   assembler->Return(var_result.value());
 }
-}  // anonymous namespace
+
+}  // namespace
 
 void Builtins::Generate_OrdinaryToPrimitive_Number(
     compiler::CodeAssemblerState* state) {