[Extensions Bindings] Introduce a supportsLazyListeners property

extensions/renderer/bindings/event_emitter_unittest.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/bindings/event_emitter.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "extensions/renderer/bindings/api_binding_test.h"
@@ skipping 11 matching lines @@
 
 }  // namespace
 
 using EventEmitterUnittest = APIBindingTest;
 
 TEST_F(EventEmitterUnittest, TestDispatchMethod) {
   v8::HandleScope handle_scope(isolate());
   v8::Local<v8::Context> context = MainContext();
 
   auto listeners = base::MakeUnique<UnfilteredEventListeners>(
-      base::Bind(&DoNothingOnListenerChange), binding::kNoListenerMax);
+      base::Bind(&DoNothingOnListenerChange), binding::kNoListenerMax, true);
 
   // The test util methods enforce that functions always throw or always don't
   // throw, but we test listeners that do both. Provide implementations for
   // running functions that don't enforce throw behavior.
   auto run_js_sync = [](v8::Local<v8::Function> function,
                         v8::Local<v8::Context> context, int argc,
                         v8::Local<v8::Value> argv[]) {
     v8::Global<v8::Value> global_result;
     v8::Local<v8::Value> result;
     if (function->Call(context, context->Global(), argc, argv).ToLocal(&result))
@@ skipping 67 matching lines @@
   for (const char* property :
        {"eventArgs1", "eventArgs2", "eventArgs3", "eventArgs4"}) {
     EXPECT_EQ(kExpectedEventArgs, GetStringPropertyFromObject(
                                       context->Global(), context, property));
   }
   EXPECT_EQ("{\"results\":[\"listener1\",{\"listener\":\"listener2\"}]}",
             V8ToString(dispatch_result, context));
 }
 
 }  // namespace extensions