Move compiler cctests into v8::internal::compiler namespace.

test/cctest/compiler/codegen-tester.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 "test/cctest/cctest.h"
 #include "test/cctest/compiler/codegen-tester.h"
 #include "test/cctest/compiler/value-helper.h"
 
-using namespace v8::internal;
-using namespace v8::internal::compiler;
+namespace v8 {
+namespace internal {
+namespace compiler {
 
 TEST(CompareWrapper) {
   // Who tests the testers?
   // If CompareWrapper is broken, then test expectations will be broken.
   CompareWrapper wWord32Equal(IrOpcode::kWord32Equal);
   CompareWrapper wInt32LessThan(IrOpcode::kInt32LessThan);
   CompareWrapper wInt32LessThanOrEqual(IrOpcode::kInt32LessThanOrEqual);
   CompareWrapper wUint32LessThan(IrOpcode::kUint32LessThan);
   CompareWrapper wUint32LessThanOrEqual(IrOpcode::kUint32LessThanOrEqual);
 
@@ skipping 540 matching lines @@
   }
 
   {
     RawMachineAssemblerTester<int32_t> m;
     Float64BinopTester bt(&m);
     bt.AddReturn(bt.param1);
 
     FOR_FLOAT64_INPUTS(i) { CheckDoubleEq(*i, bt.call(-11.25, *i)); }
   }
 }
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8