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

test/cctest/compiler/test-node.cc

 // Copyright 2013 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.
 
 // TODO(jochen): Remove this after the setting is turned on globally.
 #define V8_IMMINENT_DEPRECATION_WARNINGS
 
 #include <functional>
 
 #include "src/compiler/graph.h"
 #include "src/compiler/node.h"
 #include "src/compiler/operator.h"
 #include "test/cctest/cctest.h"
 
-using namespace v8::internal;
-using namespace v8::internal::compiler;
+namespace v8 {
+namespace internal {
+namespace compiler {
 
 #define NONE reinterpret_cast<Node*>(1)
 
 static Operator dummy_operator0(IrOpcode::kParameter, Operator::kNoWrite,
                                 "dummy", 0, 0, 0, 1, 0, 0);
 static Operator dummy_operator1(IrOpcode::kParameter, Operator::kNoWrite,
                                 "dummy", 1, 0, 0, 1, 0, 0);
 static Operator dummy_operator2(IrOpcode::kParameter, Operator::kNoWrite,
                                 "dummy", 2, 0, 0, 1, 0, 0);
 static Operator dummy_operator3(IrOpcode::kParameter, Operator::kNoWrite,
@@ skipping 751 matching lines @@
     CheckInputs(last, nodes, i);
 
     for (int j = 0; j < i; j++) {
       if (j < i) CHECK_USES(nodes[j], last);
       if (j >= i) CHECK_USES(nodes[j], NONE);
     }
 
     CHECK_USES(last, NONE);
   }
 }
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8