Make test-dictionary work for GC stress builder.

test/cctest/test-dictionary.cc

Index: test/cctest/test-dictionary.cc
diff --git a/test/cctest/test-dictionary.cc b/test/cctest/test-dictionary.cc
index 00e38333fcd2645c77852cefd38c5ac162f740dc..2acd4e664ee05d8bb0a9123ad1010ba80bcfd70a 100644
--- a/test/cctest/test-dictionary.cc
+++ b/test/cctest/test-dictionary.cc
@@ -114,7 +114,8 @@ TEST(ObjectHashSetCausesGC) {
 
   // Simulate a full heap so that generating an identity hash code
   // in subsequent calls will request GC.
-  FLAG_gc_interval = 0;
+  SimulateFullSpace(HEAP->new_space());
+  SimulateFullSpace(HEAP->old_pointer_space());
 
   // Calling Contains() should not cause GC ever.
   CHECK(!table->Contains(*key));
@@ -143,7 +144,8 @@ TEST(ObjectHashTableCausesGC) {
 
   // Simulate a full heap so that generating an identity hash code
   // in subsequent calls will request GC.
-  FLAG_gc_interval = 0;
+  SimulateFullSpace(HEAP->new_space());
+  SimulateFullSpace(HEAP->old_pointer_space());
 
   // Calling Lookup() should not cause GC ever.
   CHECK(table->Lookup(*key)->IsTheHole());