[Reland][Extensions Bindings] Add support for filtered events

extensions/renderer/dispatcher.cc

Index: extensions/renderer/dispatcher.cc
diff --git a/extensions/renderer/dispatcher.cc b/extensions/renderer/dispatcher.cc
index 4dcf0389e2b7fd0f8d7a1ccc456b58670f6267d1..72df5e05987380ccfa1dbef90a24b7a6e0f91d63 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -206,14 +206,34 @@ void SendRequestIPC(ScriptContext* context,
 // background pages.
 void SendEventListenersIPC(binding::EventListenersChanged changed,
                            ScriptContext* context,
-                           const std::string& event_name) {
-  if (changed == binding::EventListenersChanged::HAS_LISTENERS) {
-    content::RenderThread::Get()->Send(new ExtensionHostMsg_AddListener(
-        context->GetExtensionID(), context->url(), event_name));
+                           const std::string& event_name,
+                           const base::DictionaryValue* filter) {
+  // TODO(devlin): Fix this. We need to account for lazy listeners, but it
+  // also depends on if the listener is removed due to the context being torn
+  // down or the extension unregistering.
+  bool lazy = false;
+  std::string extension_id = context->GetExtensionID();
+
+  if (filter) {
+    if (changed == binding::EventListenersChanged::HAS_LISTENERS) {
+      content::RenderThread::Get()->Send(
+          new ExtensionHostMsg_AddFilteredListener(extension_id, event_name,
+                                                   *filter, lazy));
+    } else {
+      DCHECK_EQ(binding::EventListenersChanged::NO_LISTENERS, changed);
+      content::RenderThread::Get()->Send(
+          new ExtensionHostMsg_RemoveFilteredListener(extension_id, event_name,
+                                                      *filter, lazy));
+    }
   } else {
-    DCHECK_EQ(binding::EventListenersChanged::NO_LISTENERS, changed);
-    content::RenderThread::Get()->Send(new ExtensionHostMsg_RemoveListener(
-        context->GetExtensionID(), context->url(), event_name));
+    if (changed == binding::EventListenersChanged::HAS_LISTENERS) {
+      content::RenderThread::Get()->Send(new ExtensionHostMsg_AddListener(
+          context->GetExtensionID(), context->url(), event_name));
+    } else {
+      DCHECK_EQ(binding::EventListenersChanged::NO_LISTENERS, changed);
+      content::RenderThread::Get()->Send(new ExtensionHostMsg_RemoveListener(
+          context->GetExtensionID(), context->url(), event_name));
+    }
   }
 }