Drop IsPregenerated() and allow_stub_calls flag.

test/cctest/test-macro-assembler-arm.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 130 matching lines @@
   // Allocate an executable page of memory.
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
                                                  &actual_size,
                                                  true));
   CHECK(buffer);
   Isolate* isolate = CcTest::i_isolate();
   HandleScope handles(isolate);
   MacroAssembler assembler(isolate, buffer, static_cast<int>(actual_size));
   MacroAssembler* masm = &assembler;  // Create a pointer for the __ macro.
-  masm->set_allow_stub_calls(false);
   __ sub(sp, sp, Operand(1 * kPointerSize));
   Label exit;
 
   // Test 1.
   __ mov(r0, Operand(1));  // Test number.
   __ mov(r1, Operand(0));
   __ str(r1, MemOperand(sp, 0 * kPointerSize));
   __ mov(r2, Operand(-1));
   __ Store(r2, MemOperand(sp, 0 * kPointerSize), Representation::UInteger8());
   __ ldr(r3, MemOperand(sp, 0 * kPointerSize));
@@ skipping 62 matching lines @@
       Code::ComputeFlags(Code::STUB),
       Handle<Code>())->ToObjectChecked();
   CHECK(code->IsCode());
 
   // Call the function from C++.
   F5 f = FUNCTION_CAST<F5>(Code::cast(code)->entry());
   CHECK_EQ(0, CALL_GENERATED_CODE(f, 0, 0, 0, 0, 0));
 }
 
 #undef __