[Extensions] Propagate activeTab hosts to extension background pages

extensions/browser/extension_web_contents_observer.cc

Index: extensions/browser/extension_web_contents_observer.cc
diff --git a/extensions/browser/extension_web_contents_observer.cc b/extensions/browser/extension_web_contents_observer.cc
index 0a816aec5d466fdc677ad57c89bf30ca223e5bf6..ba13edd69c385e2a5dc46df0c00481489b7b5b85 100644
--- a/extensions/browser/extension_web_contents_observer.cc
+++ b/extensions/browser/extension_web_contents_observer.cc
@@ -75,9 +75,12 @@ void ExtensionWebContentsObserver::RenderViewCreated(
       // 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;