[Extensions] Propagate activeTab hosts to extension background pages

extensions/browser/extension_web_contents_observer.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/browser/extension_web_contents_observer.h"
 
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/site_instance.h"
@@ skipping 57 matching lines @@
   switch (type) {
     case Manifest::TYPE_EXTENSION:
     case Manifest::TYPE_USER_SCRIPT:
     case Manifest::TYPE_HOSTED_APP:
     case Manifest::TYPE_LEGACY_PACKAGED_APP:
     case Manifest::TYPE_PLATFORM_APP:
       // Always send a Loaded message before ActivateExtension so that
       // ExtensionDispatcher knows what Extension is active, not just its ID.
       // This is important for classifying the Extension's JavaScript context
       // correctly (see ExtensionDispatcher::ClassifyJavaScriptContext).
+      // We also have to include the tab-specific permissions here, since it's
+      // an extension process.
       render_view_host->Send(
           new ExtensionMsg_Loaded(std::vector<ExtensionMsg_Loaded_Params>(
-              1, ExtensionMsg_Loaded_Params(extension))));
+              1, ExtensionMsg_Loaded_Params(
+                     extension, true /* include tab permissions */))));
       render_view_host->Send(
           new ExtensionMsg_ActivateExtension(extension->id()));
       break;
 
     case Manifest::TYPE_UNKNOWN:
     case Manifest::TYPE_THEME:
     case Manifest::TYPE_SHARED_MODULE:
       break;
 
     case Manifest::NUM_LOAD_TYPES:
@@ skipping 29 matching lines @@
   // site, so we can ignore that wrinkle here.
   const GURL& site = render_view_host->GetSiteInstance()->GetSiteURL();
 
   if (!site.SchemeIs(kExtensionScheme))
     return std::string();
 
   return site.host();
 }
 
 }  // namespace extensions