Add the ability to return descedant event listeners.

third_party/WebKit/LayoutTests/inspector-protocol/debugger/domdebugger-getEventListeners-expected.txt

Index: third_party/WebKit/LayoutTests/inspector-protocol/debugger/domdebugger-getEventListeners-expected.txt
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/debugger/domdebugger-getEventListeners-expected.txt b/third_party/WebKit/LayoutTests/inspector-protocol/debugger/domdebugger-getEventListeners-expected.txt
index c2d3373678199350d71facdb720bcc4d0d43747d..b3c1be6ed1150e8d2d35a25dab225c8bdf419cb1 100644
--- a/third_party/WebKit/LayoutTests/inspector-protocol/debugger/domdebugger-getEventListeners-expected.txt
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/debugger/domdebugger-getEventListeners-expected.txt
@@ -17,7 +17,7 @@ Event listeners of window
 
   type:load
   useCapture:false
-  lineNumber:164
+  lineNumber:202
   columnNumber:18
   handler.type:function
   handler.className:Function
@@ -40,6 +40,64 @@ Event listeners of window
   handler.description:function (){ consol.log(42) }
 
 
+Event listeners of window & descendants
+  type:blur
+  useCapture:false
+  lineNumber:199
+  columnNumber:41
+  handler.type:function
+  handler.className:Function
+  handler.description:function onblur(event) {  return 50;}
+
+  type:click
+  useCapture:true
+  lineNumber:3
+  columnNumber:33
+  handler.type:function
+  handler.className:Function
+  handler.description:function clickHandler(event) { console.log('click - button - bubbling (registered before attribute)'); }
+
+  type:hover
+  useCapture:true
+  lineNumber:5
+  columnNumber:66
+  handler.type:function
+  handler.className:Function
+  handler.description:function hoverHandler(event) { console.log("hover - button - bubbling"); }
+
+  type:load
+  useCapture:false
+  lineNumber:202
+  columnNumber:18
+  handler.type:function
+  handler.className:Function
+  handler.description:function onload(event) {  runTest();}
+
+  type:load
+  useCapture:false
+  lineNumber:198
+  columnNumber:33
+  handler.type:function
+  handler.className:Function
+  handler.description:function onload(event) {  return 42;}
+
+  type:scroll
+  useCapture:false
+  lineNumber:1
+  columnNumber:54
+  handler.type:function
+  handler.className:Function
+  handler.description:function (){ consol.log(42) }
+
+  type:scroll
+  useCapture:false
+  lineNumber:2
+  columnNumber:54
+  handler.type:function
+  handler.className:Function
+  handler.description:function (){ consol.log(42) }
+
+
 Event listeners of div#listeners1
   type:click
   useCapture:true
@@ -59,7 +117,41 @@ Event listeners of div#listeners1
 
   type:load
   useCapture:false
-  lineNumber:162
+  lineNumber:198
+  columnNumber:33
+  handler.type:function
+  handler.className:Function
+  handler.description:function onload(event) {  return 42;}
+
+
+Event listeners of div#listeners1 and descendants
+  type:blur
+  useCapture:false
+  lineNumber:199
+  columnNumber:41
+  handler.type:function
+  handler.className:Function
+  handler.description:function onblur(event) {  return 50;}
+
+  type:click
+  useCapture:true
+  lineNumber:2
+  columnNumber:33
+  handler.type:function
+  handler.className:Function
+  handler.description:function clickHandler(event) { console.log('click - button - bubbling (registered before attribute)'); }
+
+  type:hover
+  useCapture:true
+  lineNumber:4
+  columnNumber:63
+  handler.type:function
+  handler.className:Function
+  handler.description:function hoverHandler(event) { console.log("hover - button - bubbling"); }
+
+  type:load
+  useCapture:false
+  lineNumber:198
   columnNumber:33
   handler.type:function
   handler.className:Function