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chrome/browser/extensions/extension_tab_util.cc

 // Copyright (c) 2012 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_tab_util.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 423 matching lines @@
           new std::string(chrome::GetExtensionIdForMutedTab(contents)));
       break;
   }
   return info;
 }
 
 // static
 void ExtensionTabUtil::ScrubTabForExtension(const Extension* extension,
                                             content::WebContents* contents,
                                             api::tabs::Tab* tab) {
-  DCHECK(extension);
-
-  bool api_permission = false;
-  std::string url;
-  if (contents) {
-    api_permission = extension->permissions_data()->HasAPIPermissionForTab(
-        GetTabId(contents), APIPermission::kTab);
-    url = contents->GetURL().spec();
-  } else {
-    api_permission =
-        extension->permissions_data()->HasAPIPermission(APIPermission::kTab);
-    url = *tab->url;
+  bool has_permission = false;
+  if (extension) {
+    bool api_permission = false;
+    std::string url;
+    if (contents) {
+      api_permission = extension->permissions_data()->HasAPIPermissionForTab(
+          GetTabId(contents), APIPermission::kTab);
+      url = contents->GetURL().spec();
+    } else {
+      api_permission =
+          extension->permissions_data()->HasAPIPermission(APIPermission::kTab);
+      url = *tab->url;
+    }
+    bool host_permission = extension->permissions_data()
+                               ->active_permissions()
+                               .HasExplicitAccessToOrigin(GURL(url));
+    has_permission = api_permission || host_permission;
   }
-  bool host_permission = extension->permissions_data()
-                             ->active_permissions()
-                             .HasExplicitAccessToOrigin(GURL(url));
-  bool has_permission = api_permission || host_permission;
   if (!has_permission) {
     tab->url.reset();
     tab->title.reset();
     tab->fav_icon_url.reset();
   }
 }
 
 bool ExtensionTabUtil::GetTabStripModel(const WebContents* web_contents,
                                         TabStripModel** tab_strip_model,
                                         int* tab_index) {
@@ skipping 195 matching lines @@
   chrome::ShowSingletonTabOverwritingNTP(browser, params);
   return true;
 }
 
 // static
 bool ExtensionTabUtil::BrowserSupportsTabs(Browser* browser) {
   return browser && browser->tab_strip_model() && !browser->is_devtools();
 }
 
 }  // namespace extensions