Refactoring: de-couple Extensions from "script injection System" [render side]:2

extensions/renderer/extension_injection_host.cc

 // Copyright 2015 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/common/manifest_handlers/csp_info.h"
 #include "extensions/renderer/extension_injection_host.h"
 
 namespace extensions {
 
 ExtensionInjectionHost::ExtensionInjectionHost(
@@ skipping 11 matching lines @@
 
 const GURL& ExtensionInjectionHost::url() const {
   return extension_->url();
 }
 
 const std::string& ExtensionInjectionHost::name() const {
   return extension_->name();
 }
 
 PermissionsData::AccessType ExtensionInjectionHost::CanExecuteOnFrame(
-      const GURL& document_url,
-      const GURL& top_frame_url,
-      int tab_id,
-      bool is_declarative) const {
+    const GURL& document_url,
+    const GURL& top_frame_url,
+    int tab_id,
+    bool is_declarative) const {
+  // If we don't have a tab id, we have no UI surface to ask for user consent.
+  // For now, we treat this as an automatic allow.
+  if (tab_id == -1)
+    return PermissionsData::ACCESS_ALLOWED;
+
   // Declarative user scripts use "page access" (from "permissions" section in
   // manifest) whereas non-declarative user scripts use custom
   // "content script access" logic.
   if (is_declarative) {
     return extension_->permissions_data()->GetPageAccess(
         extension_.get(),
         document_url,
         top_frame_url,
         tab_id,
         -1,  // no process id
@@ skipping 13 matching lines @@
   // We notify the browser of any injection if the extension has no withheld
   // permissions (i.e., the permissions weren't restricted), but would have
   // otherwise been affected by the scripts-require-action feature.
   return extension_->permissions_data()->withheld_permissions()->IsEmpty() &&
          PermissionsData::ScriptsMayRequireActionForExtension(
              extension_.get(),
              extension_->permissions_data()->active_permissions().get());
 }
 
 }  // namespace extensions