X87: [api] Expose FunctionCallbackInfo::NewTarget.

  port 306c412c (r35833)

  original commit message:
  This is needed by Blink to implement the Custom Elements spec.

BUG=

Review-Url: https://codereview.chromium.org/1928213002
Cr-Commit-Position: refs/heads/master@{#35889}

src/x87/builtins-x87.cc

@@ -186,16 +186,9 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     __ j(greater_equal, &loop);
 
     // Call the function.
-    if (is_api_function) {
-      __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
-      Handle<Code> code =
-          masm->isolate()->builtins()->HandleApiCallConstruct();
-      __ call(code, RelocInfo::CODE_TARGET);
-    } else {
     ParameterCount actual(eax);
     __ InvokeFunction(edi, edx, actual, CALL_FUNCTION,
                       CheckDebugStepCallWrapper());
-    }
 
     // Store offset of return address for deoptimizer.
     if (create_implicit_receiver && !is_api_function) {

src/x87/code-stubs-x87.cc

@@ -5361,9 +5361,14 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
-  STATIC_ASSERT(FCA::kArgsLength == 7);
+  STATIC_ASSERT(FCA::kNewTargetIndex == 7);
+  STATIC_ASSERT(FCA::kArgsLength == 8);
 
   __ pop(return_address);
+
+  // new target
+  __ PushRoot(Heap::kUndefinedValueRootIndex);
+
   // context save.
   __ push(context);
 
@@ -5408,7 +5413,7 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
-  const int kApiStackSpace = 4;
+  const int kApiStackSpace = 3;
 
   PrepareCallApiFunction(masm, kApiArgc + kApiStackSpace);
 
@@ -5419,8 +5424,6 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   __ mov(ApiParameterOperand(3), scratch);
   // FunctionCallbackInfo::length_.
   __ Move(ApiParameterOperand(4), Immediate(argc()));
-  // FunctionCallbackInfo::is_construct_call_.
-  __ Move(ApiParameterOperand(5), Immediate(0));
 
   // v8::InvocationCallback's argument.
   __ lea(scratch, ApiParameterOperand(2));
@@ -5440,8 +5443,8 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   }
   Operand return_value_operand(ebp, return_value_offset * kPointerSize);
   int stack_space = 0;
-  Operand is_construct_call_operand = ApiParameterOperand(5);
-  Operand* stack_space_operand = &is_construct_call_operand;
+  Operand length_operand = ApiParameterOperand(4);
+  Operand* stack_space_operand = &length_operand;
   stack_space = argc() + FCA::kArgsLength + 1;
   stack_space_operand = nullptr;
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,