Enable content scripts to receive extension API events.

chrome/browser/extensions/extension_event_router.cc

 // Copyright (c) 2011 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 "chrome/browser/extensions/extension_event_router.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_devtools_manager.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_processes_api.h"
 #include "chrome/browser/extensions/extension_processes_api_constants.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_tabs_module.h"
 #include "chrome/browser/extensions/extension_webrequest_api.h"
 #include "chrome/browser/extensions/process_map.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_messages.h"
+#include "chrome/common/extensions/api/extension_api.h"
 #include "content/browser/child_process_security_policy.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/public/browser/notification_service.h"
 
 using content::BrowserThread;
+using extensions::ExtensionAPI;
 
 namespace {
 
 const char kDispatchEvent[] = "Event.dispatchJSON";
 
 void NotifyEventListenerRemovedOnIOThread(
     void* profile,
     const std::string& extension_id,
     const std::string& sub_event_name) {
   ExtensionWebRequestEventRouter::GetInstance()->RemoveEventListener(
@@ skipping 229 matching lines @@
 
     // The extension could have been removed, but we do not unregister it until
     // the extension process is unloaded.
     if (!extension)
       continue;
 
     Profile* listener_profile = Profile::FromBrowserContext(
         listener->process->browser_context());
     extensions::ProcessMap* process_map =
         listener_profile->GetExtensionService()->process_map();
-    if (!process_map->Contains(extension->id(), listener->process->id()))
+
+    // If the event is privileged, only send to extension processes. Otherwise,
+    // it's OK to send to normal renderers (e.g., for content scripts).
+    if (ExtensionAPI::GetInstance()->IsPrivileged(event->event_name) &&
+        !process_map->Contains(extension->id(), listener->process->id())) {
       continue;
+    }
 
     // Is this event from a different profile than the renderer (ie, an
     // incognito tab event sent to a normal process, or vice versa).
     bool cross_incognito = event->restrict_to_profile &&
         listener_profile != event->restrict_to_profile;
     // Send the event with different arguments to extensions that can't
     // cross incognito, if necessary.
     if (cross_incognito && !service->CanCrossIncognito(extension)) {
       if (!event->cross_incognito_args.empty()) {
         DispatchEvent(listener->process, listener->extension_id,
@@ skipping 93 matching lines @@
       ExtensionHost* eh = content::Details<ExtensionHost>(details).ptr();
       DispatchPendingEvents(eh->extension_id());
       break;
     }
     // TODO(tessamac): if background page crashed/failed clear queue.
     default:
       NOTREACHED();
       return;
   }
 }