[turbofan] Lower StringEqual and friends in EffectControlLinearizer.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index bd607e2f3712c03a7f071a884fd5c355684c4912..9a21e236cff78bb6608250837e72e8ca49afbd24 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -27,6 +27,7 @@
 #include "src/external-reference-table.h"
 #include "src/frames-inl.h"
 #include "src/ic/stub-cache.h"
+#include "src/interface-descriptors.h"
 #include "src/interpreter/interpreter.h"
 #include "src/isolate-inl.h"
 #include "src/libsampler/sampler.h"
@@ -2390,6 +2391,12 @@ bool Isolate::Init(Deserializer* des) {
     return false;
   }
 
+// Initialize the interface descriptors ahead of time.
+#define INTERFACE_DESCRIPTOR(V) \
+  { V##Descriptor(this); }
+  INTERFACE_DESCRIPTOR_LIST(INTERFACE_DESCRIPTOR)
+#undef INTERFACE_DESCRIPTOR
+
   deoptimizer_data_ = new DeoptimizerData(heap()->memory_allocator());
 
   const bool create_heap_objects = (des == NULL);