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

test/cctest/compiler/test-graph-visualizer.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.
 
 // TODO(jochen): Remove this after the setting is turned on globally.
 #define V8_IMMINENT_DEPRECATION_WARNINGS
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/operator.h"
 #include "src/compiler/schedule.h"
 #include "src/compiler/scheduler.h"
 #include "src/compiler/source-position.h"
 #include "src/compiler/verifier.h"
 #include "test/cctest/cctest.h"
 
-using namespace v8::internal;
-using namespace v8::internal::compiler;
+namespace v8 {
+namespace internal {
+namespace compiler {
 
 static Operator dummy_operator1(IrOpcode::kParameter, Operator::kNoWrite,
                                 "dummy", 1, 0, 0, 1, 0, 0);
 static Operator dummy_operator6(IrOpcode::kParameter, Operator::kNoWrite,
                                 "dummy", 6, 0, 0, 1, 0, 0);
 
 
 TEST(NodeWithNullInputReachableFromEnd) {
   HandleAndZoneScope scope;
   Graph graph(scope.main_zone());
@@ skipping 88 matching lines @@
   Node* n11 = graph.NewNode(&dummy_operator1, n9);
   Node* end_dependencies[6] = {n4, n8, n10, n11, n6, n7};
   Node* end = graph.NewNode(&dummy_operator6, 6, end_dependencies);
   graph.SetEnd(end);
 
   OFStream os(stdout);
   os << AsDOT(graph);
   SourcePositionTable table(&graph);
   os << AsJSON(graph, &table);
 }
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8