Renamed V8 private properties

This CL renames V8 private property names regarding to
V8EventListenerOrEventHandler.
This property is used in not only blink::V8EventListenerOrEventHandler
but also other classes (blink::V8EventListenerImpl,
blink::V8LazyEventListener, blink::V8EventListenerHelper).
These classes that is related to event listener is under redesigning
as described crbug.com/872138 and it is confusing to use
"V8EventListenerOrEventHandler" for the InterfaceName of private
properties.

Bug: 872138
Change-Id: I2509f60e7b527260b5f51a1e69305a53c3836302
Reviewed-on: https://chromium-review.googlesource.com/1206752Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Yuki Yamada <yukiy@google.com>
Cr-Commit-Position: refs/heads/master@{#589092}

third_party/blink/renderer/bindings/core/v8/v8_event_listener_helper.cc

@@ -74,10 +74,8 @@ EventListener* V8EventListenerHelper::GetEventListener(
   v8::Isolate* isolate = script_state->GetIsolate();
   V8PrivateProperty::Symbol listener_property =
       is_attribute
-          ? V8PrivateProperty::
-                GetV8EventListenerOrEventHandlerAttributeListener(isolate)
-          : V8PrivateProperty::GetV8EventListenerOrEventHandlerListener(
-                isolate);
+          ? V8PrivateProperty::GetCustomWrappableEventHandler(isolate)
+          : V8PrivateProperty::GetCustomWrappableEventListener(isolate);
 
   return GetEventListenerInternal<EventListener>(
       script_state, object, listener_property, lookup,

third_party/blink/renderer/bindings/core/v8/v8_lazy_event_listener.cc

@@ -204,9 +204,9 @@ void V8LazyEventListener::CompileScript(ScriptState* script_state,
 
   wrapped_function->SetName(V8String(GetIsolate(), function_name_));
 
-  SetListenerObject(script_state, wrapped_function,
-                    V8PrivateProperty::GetV8EventListenerOrEventHandlerListener(
-                        GetIsolate()));
+  SetListenerObject(
+      script_state, wrapped_function,
+      V8PrivateProperty::GetCustomWrappableEventListener(GetIsolate()));
 }
 
 void V8LazyEventListener::FireErrorEvent(v8::Local<v8::Context> v8_context,

third_party/blink/renderer/platform/bindings/v8_private_property.h

@@ -51,8 +51,8 @@ class ScriptWrappable;
   X(SameObject, PerformanceLongTaskTimingAttribution) \
   X(SameObject, PushManagerSupportedContentEncodings) \
   X(V8ErrorHandler, ErrorHandler)                     \
-  X(V8EventListenerOrEventHandler, AttributeListener) \
-  X(V8EventListenerOrEventHandler, Listener)          \
+  X(CustomWrappable, EventHandler)                    \
+  X(CustomWrappable, EventListener)                   \
   SCRIPT_PROMISE_PROPERTIES(X, Promise)               \
   SCRIPT_PROMISE_PROPERTIES(X, Resolver)