Add the ability to return descedant event listeners.

third_party/WebKit/Source/platform/v8_inspector/V8InjectedScriptHost.cpp

 // Copyright 2015 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 "platform/v8_inspector/V8InjectedScriptHost.h"
 
 #include "platform/inspector_protocol/String16.h"
 #include "platform/v8_inspector/InjectedScriptNative.h"
 #include "platform/v8_inspector/V8Compat.h"
 #include "platform/v8_inspector/V8DebuggerImpl.h"
@@ skipping 149 matching lines @@
         result->Set(v8::Number::New(isolate, outputIndex++), listenerEntry);
     }
     return result;
 }
 
 void V8InjectedScriptHost::getEventListenersCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (info.Length() < 1)
         return;
 
+    unsigned filterMask = V8EventListenerInfo::EventListenerFilterShowPassive | V8EventListenerInfo::EventListenerFilterShowBlocking;
+    if (info.Length() > 1 && info[1]->IsTrue())
+        filterMask |= V8EventListenerInfo::EventListenerFilterShowDescendants;
+
+    if (info.Length() > 2 && info[2]->IsFalse())
+        filterMask &= ~V8EventListenerInfo::EventListenerFilterShowPassive;
+
+    if (info.Length() > 3 && info[3]->IsFalse())
+        filterMask &= ~V8EventListenerInfo::EventListenerFilterShowBlocking;
+
     V8DebuggerClient* client = unwrapDebugger(info)->client();
     V8EventListenerInfoList listenerInfo;
     // eventListeners call can produce message on ErrorEvent during lazy event listener compilation.
     client->muteWarningsAndDeprecations();
-    client->eventListeners(info[0], listenerInfo);
+    client->eventListeners(info[0], filterMask, listenerInfo);
     client->unmuteWarningsAndDeprecations();
 
     v8::Local<v8::Object> result = v8::Object::New(info.GetIsolate());
     protocol::HashSet<String16> types;
     for (auto& info : listenerInfo)
         types.add(info.eventType);
     for (const auto& it : types) {
         v8::Local<v8::Array> listeners = wrapListenerFunctions(info.GetIsolate(), listenerInfo, it.first);
         if (!listeners->Length())
             continue;
@@ skipping 147 matching lines @@
 {
     return v8::Private::ForApi(isolate, toV8StringInternalized(isolate, "V8Debugger#scopeExtension"));
 }
 
 bool V8Debugger::isRemoteObjectAPIMethod(const String16& name)
 {
     return name == "bindRemoteObject";
 }
 
 } // namespace blink