Revert "Remove deprecated ShouldSelfOptimize machinery."

src/x87/full-codegen-x87.cc

Index: src/x87/full-codegen-x87.cc
diff --git a/src/x87/full-codegen-x87.cc b/src/x87/full-codegen-x87.cc
index 86613229f924c040745fba0d61c5d4de0931aac4..fa9088cdf549e3c0e4220fb6ce3581552f648dc6 100644
--- a/src/x87/full-codegen-x87.cc
+++ b/src/x87/full-codegen-x87.cc
@@ -380,9 +380,14 @@ void FullCodeGenerator::EmitReturnSequence() {
       __ CallRuntime(Runtime::kTraceExit, 1);
     }
     // Pretend that the exit is a backwards jump to the entry.
-    int distance = masm_->pc_offset();
-    int weight =
-        Min(kMaxBackEdgeWeight, Max(1, distance / kCodeSizeMultiplier));
+    int weight = 1;
+    if (info_->ShouldSelfOptimize()) {
+      weight = FLAG_interrupt_budget / FLAG_self_opt_count;
+    } else {
+      int distance = masm_->pc_offset();
+      weight = Min(kMaxBackEdgeWeight,
+                   Max(1, distance / kCodeSizeMultiplier));
+    }
     EmitProfilingCounterDecrement(weight);
     Label ok;
     __ j(positive, &ok, Label::kNear);