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

test/cctest/compiler/test-linkage.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/code-stubs.h"
 #include "src/compiler.h"
 #include "src/parser.h"
 #include "src/zone.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/operator.h"
 #include "src/compiler/pipeline.h"
 #include "src/compiler/schedule.h"
 #include "test/cctest/cctest.h"
 
-using namespace v8::internal;
-using namespace v8::internal::compiler;
+namespace v8 {
+namespace internal {
+namespace compiler {
 
 static Operator dummy_operator(IrOpcode::kParameter, Operator::kNoWrite,
                                "dummy", 0, 0, 0, 0, 0, 0);
 
 // So we can get a real JS function.
 static Handle<JSFunction> Compile(const char* source) {
   Isolate* isolate = CcTest::i_isolate();
   Handle<String> source_code = isolate->factory()
                                    ->NewStringFromUtf8(CStrVector(source))
                                    .ToHandleChecked();
@@ skipping 71 matching lines @@
 
 
 TEST(TestLinkageRuntimeCall) {
   // TODO(titzer): test linkage creation for outgoing runtime calls.
 }
 
 
 TEST(TestLinkageStubCall) {
   // TODO(titzer): test linkage creation for outgoing stub calls.
 }
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8