[Isolates] Merge crankshaft (r5922 from bleeding_edge).

test/cctest/test-mark-compact.cc

Index: test/cctest/test-mark-compact.cc
diff --git a/test/cctest/test-mark-compact.cc b/test/cctest/test-mark-compact.cc
index b006cfbf05f4b87c7fce1bfc926e62f0b08e61fb..cfe9e196e62cb24e6734ecd594d64a546f1c3ae4 100644
--- a/test/cctest/test-mark-compact.cc
+++ b/test/cctest/test-mark-compact.cc
@@ -70,6 +70,10 @@ TEST(MarkingStack) {
 
 
 TEST(Promotion) {
+  // This test requires compaction. If compaction is turned off, we
+  // skip the entire test.
+  if (FLAG_never_compact) return;
+
   // Ensure that we get a compacting collection so that objects are promoted
   // from new space.
   FLAG_gc_global = true;