[extension SW] Support lazy events from extension service workers.

extensions/renderer/event_bindings.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/event_bindings.h"
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
@@ skipping 231 matching lines @@
   // the context is destroyed.
   //
   // Ideally we'd CHECK that it's not already attached, however that's not
   // possible because extensions can create and attach events themselves. Very
   // silly, but that's the way it is. For an example of this, see
   // chrome/test/data/extensions/api_test/events/background.js.
   attached_event_names_.insert(event_name);
 
   const int worker_thread_id = content::WorkerThread::GetCurrentId();
   const std::string& extension_id = context()->GetExtensionID();
+  const bool is_service_worker_context =
+      context()->context_type() == Feature::SERVICE_WORKER_CONTEXT;
   IPC::Sender* sender = GetIPCSender();
   if (IncrementEventListenerCount(context(), event_name) == 1) {
     sender->Send(new ExtensionHostMsg_AddListener(
-        extension_id, context()->url(), event_name, worker_thread_id));
+        extension_id,
+        is_service_worker_context ? context()->service_worker_scope()
+                                  : context()->url(),
+        event_name, worker_thread_id));
   }
 
   // This is called the first time the page has added a listener. Since
   // the background page is the only lazy page, we know this is the first
   // time this listener has been registered.
   bool is_lazy_context =
       ExtensionFrameHelper::IsContextForEventPage(context()) ||
       context()->context_type() == Feature::SERVICE_WORKER_CONTEXT;
   if (is_lazy_context) {
-    sender->Send(new ExtensionHostMsg_AddLazyListener(extension_id, event_name,
-                                                      worker_thread_id));
+    if (is_service_worker_context) {
+      sender->Send(new ExtensionHostMsg_AddLazyServiceWorkerListener(
+          extension_id, event_name, context()->service_worker_scope()));
+    } else {
+      sender->Send(
+          new ExtensionHostMsg_AddLazyListener(extension_id, event_name));
+    }
   }
 }
 
 void EventBindings::DetachEventHandler(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK_EQ(2, args.Length());
   CHECK(args[0]->IsString());
   CHECK(args[1]->IsBoolean());
   DetachEvent(*v8::String::Utf8Value(args[0]), args[1]->BooleanValue());
 }
 
 void EventBindings::DetachEvent(const std::string& event_name, bool is_manual) {
   // See comment in AttachEvent().
   attached_event_names_.erase(event_name);
 
   int worker_thread_id = content::WorkerThread::GetCurrentId();
+  const bool is_service_worker_context = worker_thread_id != kNonWorkerThreadId;
   IPC::Sender* sender = GetIPCSender();
   const std::string& extension_id = context()->GetExtensionID();
 
   if (DecrementEventListenerCount(context(), event_name) == 0) {
     sender->Send(new ExtensionHostMsg_RemoveListener(
-        extension_id, context()->url(), event_name, worker_thread_id));
+        extension_id,
+        is_service_worker_context ? context()->service_worker_scope()
+                                  : context()->url(),
+        event_name, worker_thread_id));
   }
 
   // DetachEvent is called when the last listener for the context is
   // removed. If the context is the background page or service worker, and it
   // removes the last listener manually, then we assume that it is no longer
   // interested in being awakened for this event.
   if (is_manual) {
     bool is_lazy_context =
         ExtensionFrameHelper::IsContextForEventPage(context()) ||
         context()->context_type() == Feature::SERVICE_WORKER_CONTEXT;
     if (is_lazy_context) {
-      sender->Send(new ExtensionHostMsg_RemoveLazyListener(
-          extension_id, event_name, worker_thread_id));
+      if (is_service_worker_context) {
+        sender->Send(new ExtensionHostMsg_RemoveLazyServiceWorkerListener(
+            extension_id, event_name, context()->service_worker_scope()));
+      } else {
+        sender->Send(
+            new ExtensionHostMsg_RemoveLazyListener(extension_id, event_name));
+      }
     }
   }
 }
 
 // MatcherID AttachFilteredEvent(string event_name, object filter)
 // event_name - Name of the event to attach.
 // filter - Which instances of the named event are we interested in.
 // returns the id assigned to the listener, which will be provided to calls to
 // dispatchEvent().
 void EventBindings::AttachFilteredEvent(
@@ skipping 115 matching lines @@
   for (int matcher_id : attached_matcher_ids_safe) {
     DetachFilteredEvent(matcher_id, false /* is_manual */);
   }
   DCHECK(attached_matcher_ids_.empty())
       << "Filtered events cannot be attached during invalidation";
 
   g_unmanaged_listeners.Get().erase(context());
 }
 
 }  // namespace extensions