Revert "Make GCC happy again." and "Initial switch to Chromium-style CHECK_* and DCHECK_* macros.".

test/cctest/compiler/codegen-tester.h

Index: test/cctest/compiler/codegen-tester.h
diff --git a/test/cctest/compiler/codegen-tester.h b/test/cctest/compiler/codegen-tester.h
index d45d1fdc3322fc279185e54b0c2b0be44af15ff7..18903fd85ef0e604c93b22bc2b652b3cb93234f3 100644
--- a/test/cctest/compiler/codegen-tester.h
+++ b/test/cctest/compiler/codegen-tester.h
@@ -332,16 +332,6 @@ class Int32BinopInputShapeTester {
   void RunLeft(RawMachineAssemblerTester<int32_t>* m);
   void RunRight(RawMachineAssemblerTester<int32_t>* m);
 };
-
-// TODO(bmeurer): Drop this crap once we switch to GTest/Gmock.
-static inline void CheckDoubleEq(volatile double x, volatile double y) {
-  if (std::isnan(x)) {
-    CHECK(std::isnan(y));
-  } else {
-    CHECK_EQ(x, y);
-  }
-}
-
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8