Unify InvokeBuiltin implementations across architectures.

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index f463dddd3f9e419b45ab1938d2b00ffbcc7049ba..c56cfba8c7e2db77f7a99b0e9c34842f2a56804a 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -2517,19 +2517,10 @@ void MacroAssembler::InvokeBuiltin(int native_context_index, InvokeFlag flag,
   // You can't call a builtin without a valid frame.
   DCHECK(flag == JUMP_FUNCTION || has_frame());
 
-  // Always initialize new target.
-  LoadRoot(r3, Heap::kUndefinedValueRootIndex);
-
+  // Fake a parameter count to avoid emitting code to do the check.
+  ParameterCount expected(0);
   LoadNativeContextSlot(native_context_index, r1);
-  ldr(r2, FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
-  if (flag == CALL_FUNCTION) {
-    call_wrapper.BeforeCall(CallSize(r2));
-    Call(r2);
-    call_wrapper.AfterCall();
-  } else {
-    DCHECK(flag == JUMP_FUNCTION);
-    Jump(r2);
-  }
+  InvokeFunctionCode(r1, no_reg, expected, expected, flag, call_wrapper);
 }