Plumb firing passive event listeners.

content/common/input_messages.h

Index: content/common/input_messages.h
diff --git a/content/common/input_messages.h b/content/common/input_messages.h
index 7f05b9f9d7600da7bd300905bdc0c0388fcd7d4a..117f243bc4712cc82322b07231ab6b0fb8434445 100644
--- a/content/common/input_messages.h
+++ b/content/common/input_messages.h
@@ -15,6 +15,7 @@
 #include "content/common/input/input_event.h"
 #include "content/common/input/input_event_ack.h"
 #include "content/common/input/input_event_ack_state.h"
+#include "content/common/input/input_event_dispatch_type.h"
 #include "content/common/input/input_param_traits.h"
 #include "content/common/input/synthetic_gesture_packet.h"
 #include "content/common/input/synthetic_gesture_params.h"
@@ -48,6 +49,9 @@ IPC_ENUM_TRAITS_MAX_VALUE(
 IPC_ENUM_TRAITS_MAX_VALUE(
     content::SyntheticGestureParams::GestureType,
     content::SyntheticGestureParams::SYNTHETIC_GESTURE_TYPE_MAX)
+IPC_ENUM_TRAITS_MAX_VALUE(
+    content::InputEventDispatchType,
+    content::InputEventDispatchType::DISPATCH_TYPE_NON_BLOCKING)
 IPC_ENUM_TRAITS_VALIDATE(content::TouchAction, (
     value >= 0 &&
     value <= content::TOUCH_ACTION_MAX &&
@@ -114,9 +118,10 @@ IPC_STRUCT_TRAITS_BEGIN(content::InputEventAck)
 IPC_STRUCT_TRAITS_END()
 
 // Sends an input event to the render widget.
-IPC_MESSAGE_ROUTED2(InputMsg_HandleInputEvent,
+IPC_MESSAGE_ROUTED3(InputMsg_HandleInputEvent,
                     IPC::WebInputEventPointer /* event */,
-                    ui::LatencyInfo /* latency_info */)
+                    ui::LatencyInfo /* latency_info */,
+                    content::InputEventDispatchType)
 
 // Sends the cursor visibility state to the render widget.
 IPC_MESSAGE_ROUTED1(InputMsg_CursorVisibilityChange,