Remove obsolete kForceCompactionMask flag for GC.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index 8a5b231315bf088c46992ed6b04889d0efa40ca0..d85f3b5d5efe5c57294097cd16795322ea5f9699 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -365,8 +365,8 @@ TEST(PartialSerialization) {
       Isolate::Current()->bootstrapper()->NativesSourceLookup(i);
     }
   }
-  HEAP->CollectAllGarbage(Heap::kForceCompactionMask);
-  HEAP->CollectAllGarbage(Heap::kForceCompactionMask);
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
 
   Object* raw_foo;
   {
@@ -490,7 +490,7 @@ TEST(ContextSerialization) {
   }
   // If we don't do this then we end up with a stray root pointing at the
   // context even after we have disposed of env.
-  HEAP->CollectAllGarbage(Heap::kForceCompactionMask);
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
 
   int file_name_length = StrLength(FLAG_testing_serialization_file) + 10;
   Vector<char> startup_name = Vector<char>::New(file_name_length + 1);