Refactor common unit test code.

src/compiler/instruction-selector-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/instruction-selector-unittest.h"
 
+#include "src/compiler/compiler-test-utils.h"
 #include "src/flags.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 namespace {
 
 typedef RawMachineAssembler::Label MLabel;
 
 }  // namespace
 
 
 InstructionSelectorTest::InstructionSelectorTest() : rng_(FLAG_random_seed) {}
 
 
+InstructionSelectorTest::~InstructionSelectorTest() {}
+
+
 InstructionSelectorTest::Stream InstructionSelectorTest::StreamBuilder::Build(
     InstructionSelector::Features features,
     InstructionSelectorTest::StreamBuilderMode mode) {
   Schedule* schedule = Export();
   if (FLAG_trace_turbo) {
     OFStream out(stdout);
     out << "=== Schedule before instruction selection ===" << endl << *schedule;
   }
   EXPECT_NE(0, graph()->NodeCount());
   CompilationInfo info(test_->isolate(), test_->zone());
@@ skipping 449 matching lines @@
   EXPECT_EQ(context2->id(), s.ToVreg(call_instr->InputAt(11)));
   // Continuation.
 
   EXPECT_EQ(kArchRet, s[index++]->arch_opcode());
   EXPECT_EQ(index, s.size());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8