Return a enumeration of the state of handling of InputEvents.

content/renderer/browser_plugin/browser_plugin.cc

Index: content/renderer/browser_plugin/browser_plugin.cc
diff --git a/content/renderer/browser_plugin/browser_plugin.cc b/content/renderer/browser_plugin/browser_plugin.cc
index f4b24e1cb029c0954634918d1db1fc3a77fe9973..56e1b667713291edf4ff9fe201cf88949c0558c1 100644
--- a/content/renderer/browser_plugin/browser_plugin.cc
+++ b/content/renderer/browser_plugin/browser_plugin.cc
@@ -496,25 +496,26 @@ bool BrowserPlugin::acceptsInputEvents() {
   return true;
 }
 
-bool BrowserPlugin::handleInputEvent(const blink::WebInputEvent& event,
-                                     blink::WebCursorInfo& cursor_info) {
+blink::WebInputEventResult BrowserPlugin::handleInputEvent(
+    const blink::WebInputEvent& event,
+    blink::WebCursorInfo& cursor_info) {
   if (guest_crashed_ || !attached())
-    return false;
+    return blink::WebInputEventResult::NotHandled;
 
   if (event.type == blink::WebInputEvent::MouseWheel) {
     auto wheel_event = static_cast<const blink::WebMouseWheelEvent&>(event);
     if (wheel_event.resendingPluginId == browser_plugin_instance_id_)
-      return false;
+      return blink::WebInputEventResult::NotHandled;
   }
 
   if (blink::WebInputEvent::isGestureEventType(event.type)) {
     auto gesture_event = static_cast<const blink::WebGestureEvent&>(event);
     if (gesture_event.resendingPluginId == browser_plugin_instance_id_)
-      return false;
+      return blink::WebInputEventResult::NotHandled;
   }
 
   if (event.type == blink::WebInputEvent::ContextMenu)
-    return true;
+    return blink::WebInputEventResult::HandledDefaultHandler;
 
   if (blink::WebInputEvent::isKeyboardEventType(event.type) &&
       !edit_commands_.empty()) {
@@ -534,9 +535,9 @@ bool BrowserPlugin::handleInputEvent(const blink::WebInputEvent& event,
   // Although we forward this event to the guest, we don't report it as consumed
   // since other targets of this event in Blink never get that chance either.
   if (event.type == blink::WebInputEvent::GestureFlingStart)
-    return false;
+    return blink::WebInputEventResult::NotHandled;
 
-  return true;
+  return blink::WebInputEventResult::HandledDefaultHandler;
 }
 
 bool BrowserPlugin::handleDragStatusUpdate(blink::WebDragStatus drag_status,