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

test/cctest/compiler/test-run-jsobjects.cc

Index: test/cctest/compiler/test-run-jsobjects.cc
diff --git a/test/cctest/compiler/test-run-jsobjects.cc b/test/cctest/compiler/test-run-jsobjects.cc
index 7388457128eceeb308546a9d7471cb1685e96e55..5b0fd3928351451094ad58ce4ea8cab841f84e0f 100644
--- a/test/cctest/compiler/test-run-jsobjects.cc
+++ b/test/cctest/compiler/test-run-jsobjects.cc
@@ -7,8 +7,9 @@
 
 #include "test/cctest/compiler/function-tester.h"
 
-using namespace v8::internal;
-using namespace v8::internal::compiler;
+namespace v8 {
+namespace internal {
+namespace compiler {
 
 TEST(ArgumentsMapped) {
   FunctionTester T("(function(a) { return arguments; })");
@@ -48,3 +49,7 @@ TEST(ArgumentsRest) {
   Handle<Object> length = JSObject::GetProperty(arguments, l).ToHandleChecked();
   CHECK_EQ(3, length->Number());
 }
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8