[turbofan] Add proper type guards to escape analysis.

test/unittests/compiler/escape-analysis-unittest.cc

Index: test/unittests/compiler/escape-analysis-unittest.cc
diff --git a/test/unittests/compiler/escape-analysis-unittest.cc b/test/unittests/compiler/escape-analysis-unittest.cc
index 14b1cd58d60fe2674cbe38bef4f8afcf170a125d..3a233d6872f9baacebd9f5491b516ae6f90028b6 100644
--- a/test/unittests/compiler/escape-analysis-unittest.cc
+++ b/test/unittests/compiler/escape-analysis-unittest.cc
@@ -17,7 +17,7 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-class EscapeAnalysisTest : public GraphTest {
+class EscapeAnalysisTest : public TypedGraphTest {
  public:
   EscapeAnalysisTest()
       : simplified_(zone()),