[turbofan] Merge compiler unit tests into src.

src/compiler/instruction-selector-unittest.h

 // 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.
 
-#ifndef V8_COMPILER_UNITTESTS_INSTRUCTION_SELECTOR_UNITTEST_H_
-#define V8_COMPILER_UNITTESTS_INSTRUCTION_SELECTOR_UNITTEST_H_
+#ifndef V8_COMPILER_INSTRUCTION_SELECTOR_UNITTEST_H_
+#define V8_COMPILER_INSTRUCTION_SELECTOR_UNITTEST_H_
 
 #include <deque>
 #include <set>
 
 #include "src/base/utils/random-number-generator.h"
+#include "src/compiler/compiler-unittests.h"
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/raw-machine-assembler.h"
-#include "test/compiler-unittests/compiler-unittests.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class InstructionSelectorTest : public CompilerTest {
  public:
   InstructionSelectorTest();
   virtual ~InstructionSelectorTest() {}
 
@@ skipping 167 matching lines @@
 
 template <typename T>
 class InstructionSelectorTestWithParam
     : public InstructionSelectorTest,
       public ::testing::WithParamInterface<T> {};
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_COMPILER_UNITTESTS_INSTRUCTION_SELECTOR_UNITTEST_H_
+#endif  // V8_COMPILER_INSTRUCTION_SELECTOR_UNITTEST_H_