Revert of Assume that ReportFailedAccessCheck always schedules an exception.

src/runtime/runtime-classes.cc

Index: src/runtime/runtime-classes.cc
diff --git a/src/runtime/runtime-classes.cc b/src/runtime/runtime-classes.cc
index 4c0627e168389e5ce834449e7bfbf1cf2881b05d..53583086121b130c0211d67d680188821b4da90a 100644
--- a/src/runtime/runtime-classes.cc
+++ b/src/runtime/runtime-classes.cc
@@ -272,7 +272,6 @@
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
     RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
-    UNREACHABLE();
   }
 
   PrototypeIterator iter(isolate, home_object);
@@ -298,7 +297,6 @@
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
     RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
-    UNREACHABLE();
   }
 
   PrototypeIterator iter(isolate, home_object);
@@ -376,7 +374,6 @@
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
     RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
-    UNREACHABLE();
   }
 
   PrototypeIterator iter(isolate, home_object);
@@ -402,7 +399,6 @@
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
     RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
-    UNREACHABLE();
   }
 
   PrototypeIterator iter(isolate, home_object);