[Interpreter] Fix getIgnitionDispatchCounters crash with modified Object prototype.

Changes to the Object prototype may cause getIgnitionDispatchCounters()
to fail when building the counters table object. Using DefineOwnProperty
instead of Set solves the issue by ignoring the prototype chain.

BUG=chromium:613567
LOG=N

Review-Url: https://codereview.chromium.org/2000203002
Cr-Commit-Position: refs/heads/master@{#36447}

src/interpreter/interpreter.cc

@@ -250,7 +250,8 @@ Local<v8::Object> Interpreter::GetDispatchCountersObject() {
                                     NewStringType::kNormal)
                 .ToLocalChecked();
         Local<v8::Number> counter_object = v8::Number::New(isolate, counter);
-        CHECK(counters_row->Set(context, to_name_object, counter_object)
+        CHECK(counters_row
+                  ->DefineOwnProperty(context, to_name_object, counter_object)
                   .IsJust());
       }
     }
@@ -261,7 +262,9 @@ Local<v8::Object> Interpreter::GetDispatchCountersObject() {
                                 NewStringType::kNormal)
             .ToLocalChecked();
 
-    CHECK(counters_map->Set(context, from_name_object, counters_row).IsJust());
+    CHECK(
+        counters_map->DefineOwnProperty(context, from_name_object, counters_row)
+            .IsJust());
   }
 
   return counters_map;