[turbofan] Merge compiler unit tests into src.

src/compiler/compiler-unittests.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 "include/libplatform/libplatform.h"
+#include "src/compiler/compiler-unittests.h"
 #include "src/isolate-inl.h"
-#include "test/compiler-unittests/compiler-unittests.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 using testing::IsNull;
 using testing::NotNull;
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // static
@@ skipping 54 matching lines @@
     v8::V8::Dispose();
     v8::V8::ShutdownPlatform();
     delete platform_;
     platform_ = NULL;
   }
 
  private:
   v8::Platform* platform_;
 };
 
-}
+}  // namespace
 
 
 int main(int argc, char** argv) {
   testing::InitGoogleMock(&argc, argv);
   testing::AddGlobalTestEnvironment(new CompilerTestEnvironment);
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
   return RUN_ALL_TESTS();
 }