From 21912efc29e7152414d4ce7d0e66008697f88a57 Mon Sep 17 00:00:00 2001
From: Bill McCloskey <billm@mozilla.com>
Date: Tue, 15 Nov 2016 15:35:54 -0800
Subject: [PATCH] Bug 1318506 - Label PluginInstance IPC messages with plugin's
 DocGroup (r=jimm)

The goal here is to assign a DocGroup to every runnable. This patch labels all
IPC message handlers for PPluginInstance with the DocGroup of the plugin
instance's document.

MozReview-Commit-ID: 6OIard9n2GB
---
 dom/plugins/ipc/PluginModuleParent.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/dom/plugins/ipc/PluginModuleParent.cpp b/dom/plugins/ipc/PluginModuleParent.cpp
index 3f02b60f9af8..7a67e8112f2b 100644
--- a/dom/plugins/ipc/PluginModuleParent.cpp
+++ b/dom/plugins/ipc/PluginModuleParent.cpp
@@ -2756,6 +2756,19 @@ PluginModuleParent::NPP_NewInternal(NPMIMEType pluginType, NPP instance,
     // Now replace it with the instance
     instance->pdata = static_cast<PluginDataResolver*>(parentInstance);
 
+    // Any IPC messages for the PluginInstance actor should be dispatched to the
+    // DocGroup for the plugin's document.
+    RefPtr<nsPluginInstanceOwner> owner = parentInstance->GetOwner();
+    nsCOMPtr<nsIDOMElement> elt;
+    owner->GetDOMElement(getter_AddRefs(elt));
+    if (nsCOMPtr<nsINode> node = do_QueryInterface(elt)) {
+        nsCOMPtr<nsIDocument> doc = node->OwnerDoc();
+        if (doc) {
+            nsCOMPtr<nsIEventTarget> eventTarget = doc->EventTargetFor(dom::TaskCategory::Other);
+            SetEventTargetForActor(parentInstance, eventTarget);
+        }
+    }
+
     if (!SendPPluginInstanceConstructor(parentInstance,
                                         nsDependentCString(pluginType), mode,
                                         names, values)) {