Do not expose termination exceptions to the Exception API.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 028da3d8fc86a62000087050955f817563a74372..f049208ad2c71092d2f8a21afc120974dee29de9 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -645,7 +645,10 @@ void Isolate::ReportFailedAccessCheck(Handle<JSObject> receiver,
                                       v8::AccessType type) {
   if (!thread_local_top()->failed_access_check_callback_) {
     Handle<String> message = factory()->InternalizeUtf8String("no access");
-    ScheduleThrow(*factory()->NewTypeError(message));
+    Handle<Object> error;
+    ASSIGN_RETURN_ON_EXCEPTION_VALUE(
+        this, error, factory()->NewTypeError(message), /* void */);
+    ScheduleThrow(*error);
     return;
   }
 
@@ -862,12 +865,6 @@ Object* Isolate::ThrowIllegalOperation() {
 }
 
 
-Object* Isolate::ThrowInvalidStringLength() {
-  return Throw(*factory()->NewRangeError(
-      "invalid_string_length", HandleVector<Object>(NULL, 0)));
-}
-
-
 void Isolate::ScheduleThrow(Object* exception) {
   // When scheduling a throw we first throw the exception to get the
   // error reporting if it is uncaught before rescheduling it.
@@ -2361,14 +2358,13 @@ void Isolate::RunMicrotasks() {
             Handle<JSFunction>::cast(microtask);
         SaveContext save(this);
         set_context(microtask_function->context()->native_context());
-        Handle<Object> exception;
-        MaybeHandle<Object> result = Execution::TryCall(
-            microtask_function, factory()->undefined_value(),
-            0, NULL, &exception);
+        MaybeHandle<Object> maybe_exception;
+        MaybeHandle<Object> result =
+            Execution::TryCall(microtask_function, factory()->undefined_value(),
+                               0, NULL, &maybe_exception);
         // If execution is terminating, just bail out.
-        if (result.is_null() &&
-            !exception.is_null() &&
-            *exception == heap()->termination_exception()) {
+        Handle<Object> exception;
+        if (result.is_null() && maybe_exception.is_null()) {
           // Clear out any remaining callbacks in the queue.
           heap()->set_microtask_queue(heap()->empty_fixed_array());
           set_pending_microtask_count(0);