Cosmetic changes to tests to make it easier to concatenate them.

test/cctest/test-weaksets.cc

Index: test/cctest/test-weaksets.cc
diff --git a/test/cctest/test-weaksets.cc b/test/cctest/test-weaksets.cc
index 8ed1812437293a7dd95f2a435210cf9971068a23..82d0d9f977006a75e8d6eee43db13fa3885e0b9d 100644
--- a/test/cctest/test-weaksets.cc
+++ b/test/cctest/test-weaksets.cc
@@ -34,6 +34,7 @@
 
 using namespace v8::internal;
 
+namespace weakset_tests {
 
 static Isolate* GetIsolateFrom(LocalContext* context) {
   return reinterpret_cast<Isolate*>((*context)->GetIsolate());
@@ -249,3 +250,4 @@ TEST(WeakSet_Regress2060b) {
   heap->CollectAllGarbage();
   heap->CollectAllGarbage();
 }
+}