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

test/cctest/compiler/test-basic-block-profiler.cc

Index: test/cctest/compiler/test-basic-block-profiler.cc
diff --git a/test/cctest/compiler/test-basic-block-profiler.cc b/test/cctest/compiler/test-basic-block-profiler.cc
index 3d3e214281c7319fc138027ef7c5f9a4fffe9683..1f4d87f18d5f7dcc76e637e7c5f30cff52493731 100644
--- a/test/cctest/compiler/test-basic-block-profiler.cc
+++ b/test/cctest/compiler/test-basic-block-profiler.cc
@@ -9,8 +9,9 @@
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/codegen-tester.h"
 
-using namespace v8::internal;
-using namespace v8::internal::compiler;
+namespace v8 {
+namespace internal {
+namespace compiler {
 
 typedef RawMachineAssembler::Label MLabel;
 
@@ -109,3 +110,7 @@ TEST(ProfileLoop) {
     m.Expect(arraysize(expected), expected);
   }
 }
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8