Add the ability to return descedant event listeners.

third_party/WebKit/Source/platform/v8_inspector/public/V8EventListenerInfo.h

Index: third_party/WebKit/Source/platform/v8_inspector/public/V8EventListenerInfo.h
diff --git a/third_party/WebKit/Source/platform/v8_inspector/public/V8EventListenerInfo.h b/third_party/WebKit/Source/platform/v8_inspector/public/V8EventListenerInfo.h
index 03370be8da27a004a5c15af2daa2dcfdb4c51545..d67063f666e685eca99e31e647834e34cc872e70 100644
--- a/third_party/WebKit/Source/platform/v8_inspector/public/V8EventListenerInfo.h
+++ b/third_party/WebKit/Source/platform/v8_inspector/public/V8EventListenerInfo.h
@@ -14,6 +14,10 @@ namespace blink {
 
 class V8EventListenerInfo {
 public:
+    static const unsigned EventListenerFilterShowDescendants = 1 << 0;

[caseq, 2016/05/20 00:47:24]

use enum perhaps?

[dtapuska, 2016/05/26 20:37:44]

Enums that are bitsets aren't permitted in chromium; but are kind of allowed in
blink. What do you want me to do?

+    static const unsigned EventListenerFilterShowPassive = 1 << 1;
+    static const unsigned EventListenerFilterShowBlocking = 1 << 2;
+
     V8EventListenerInfo(const String16& eventType, bool useCapture, bool passive, v8::Local<v8::Object> handler)
         : eventType(eventType)
         , useCapture(useCapture)