Add the ability to return descedant event listeners.

third_party/WebKit/Source/core/inspector/InspectorDOMDebuggerAgent.h

Index: third_party/WebKit/Source/core/inspector/InspectorDOMDebuggerAgent.h
diff --git a/third_party/WebKit/Source/core/inspector/InspectorDOMDebuggerAgent.h b/third_party/WebKit/Source/core/inspector/InspectorDOMDebuggerAgent.h
index 90ea646b43beea7ae69cfa28acfae878bf4e0533..60e7ebae9ae971ded2fac8b88795440a965dcf0c 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorDOMDebuggerAgent.h
+++ b/third_party/WebKit/Source/core/inspector/InspectorDOMDebuggerAgent.h
@@ -52,11 +52,17 @@ namespace protocol {
 class DictionaryValue;
 }
 
+enum EventListenerFilter {
+    ShowDescendants = 1 << 0,
+    ShowPassive = 1 << 1,
+    ShowBlocking = 1 << 2,
+};
+
 class CORE_EXPORT InspectorDOMDebuggerAgent final
     : public InspectorBaseAgent<protocol::DOMDebugger::Metainfo> {
     WTF_MAKE_NONCOPYABLE(InspectorDOMDebuggerAgent);
 public:
-    static void eventListenersInfoForTarget(v8::Isolate*, v8::Local<v8::Value>, V8EventListenerInfoList& listeners);
+    static void eventListenersInfoForTarget(v8::Isolate*, v8::Local<v8::Value>, EventListenerFilter filterMask, V8EventListenerInfoList& listeners);
 
     InspectorDOMDebuggerAgent(v8::Isolate*, InspectorDOMAgent*, V8InspectorSession*);
     ~InspectorDOMDebuggerAgent() override;
@@ -71,7 +77,7 @@ public:
     void removeInstrumentationBreakpoint(ErrorString*, const String& eventName) override;
     void setXHRBreakpoint(ErrorString*, const String& url) override;
     void removeXHRBreakpoint(ErrorString*, const String& url) override;
-    void getEventListeners(ErrorString*, const String16& objectId, std::unique_ptr<protocol::Array<protocol::DOMDebugger::EventListener>>* listeners) override;
+    void getEventListeners(ErrorString*, const String16& objectId, const Maybe<bool>& inDescendants, std::unique_ptr<protocol::Array<protocol::DOMDebugger::EventListener>>* listeners) override;
 
     // InspectorInstrumentation API
     void willInsertDOMNode(Node* parent);
@@ -108,7 +114,7 @@ private:
     void didRemoveBreakpoint();
     void setEnabled(bool);
 
-    void eventListeners(v8::Local<v8::Context>, v8::Local<v8::Value>, const String16& objectGroup, protocol::Array<protocol::DOMDebugger::EventListener>* listenersArray);
+    void eventListeners(v8::Local<v8::Context>, v8::Local<v8::Value>, const String16& objectGroup, EventListenerFilter filterMask, protocol::Array<protocol::DOMDebugger::EventListener>* listenersArray);
     std::unique_ptr<protocol::DOMDebugger::EventListener> buildObjectForEventListener(v8::Local<v8::Context>, const V8EventListenerInfo&, const String16& objectGroupId);
 
     v8::Isolate* m_isolate;