[turbofan] Context specialize during inlining.

test/cctest/compiler/test-run-inlining.cc

Index: test/cctest/compiler/test-run-inlining.cc
diff --git a/test/cctest/compiler/test-run-inlining.cc b/test/cctest/compiler/test-run-inlining.cc
index 5fb460f69891c520d251a31742e2217e4a67a0d9..a6d76e4d578b9ebe4624324cf6ba027f36c40253 100644
--- a/test/cctest/compiler/test-run-inlining.cc
+++ b/test/cctest/compiler/test-run-inlining.cc
@@ -508,4 +508,22 @@ TEST(InlineBuiltin) {
   T.CheckCall(T.true_value());
 }
 
+
+TEST(InlineNestedBuiltin) {
+  FLAG_turbo_deoptimization = true;
+  FunctionTester T(
+      "(function () {"
+      "  function foo(s,t,u) { AssertInlineCount(3); return true; }"
+      "  function baz(s,t,u) { return foo(s,t,u); }"
+      "  function bar() { return baz(); };"
+      "  %SetInlineBuiltinFlag(foo);"
+      "  %SetInlineBuiltinFlag(baz);"
+      "  return bar;"
+      "})();",
+      kBuiltinInlineFlags);
+
+  InstallAssertInlineCountHelper(CcTest::isolate());
+  T.CheckCall(T.true_value());
+}
+
 #endif  // V8_TURBOFAN_TARGET