Don't clear the activeTab permission for same-origin navigations when the

chrome/browser/extensions/active_tab_permission_granter.cc

Index: chrome/browser/extensions/active_tab_permission_granter.cc
diff --git a/chrome/browser/extensions/active_tab_permission_granter.cc b/chrome/browser/extensions/active_tab_permission_granter.cc
index 608eaa171c31549c8176b39df6c3d9ebb9ef7a7e..4a25df9dcc2d8a7b87ff9047217e5a104779c6e2 100644
--- a/chrome/browser/extensions/active_tab_permission_granter.cc
+++ b/chrome/browser/extensions/active_tab_permission_granter.cc
@@ -11,6 +11,7 @@
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension_messages.h"
+#include "extensions/common/feature_switch.h"
 #include "extensions/common/permissions/permission_set.h"
 #include "extensions/common/permissions/permissions_data.h"
 #include "extensions/common/user_script.h"
@@ -90,7 +91,25 @@ void ActiveTabPermissionGranter::DidNavigateMainFrame(
   if (details.is_in_page)
     return;
   DCHECK(details.is_main_frame);  // important: sub-frames don't get granted!
-  ClearActiveExtensionsAndNotify();
+
+  // Only clear the granted permissions for cross-origin navigations.
+  //
+  // See http://crbug.com/404243 for why. Currently we only differentiate
+  // between same-origin and cross-origin navigations when the
+  // script-require-action flag is on. It's not clear it's good for general
+  // activeTab consumption (we likely need to build some UI around it first).
+  // However, the scripts-require-action feature is all-but unusable without
+  // this behaviour.
+  if (FeatureSwitch::scripts_require_action()->IsEnabled()) {
+    const content::NavigationEntry* navigation_entry =
+        web_contents()->GetController().GetVisibleEntry();
+    if (!navigation_entry || (navigation_entry->GetURL().GetOrigin() !=
+                              details.previous_url.GetOrigin())) {
+      ClearActiveExtensionsAndNotify();
+    }
+  } else {
+    ClearActiveExtensionsAndNotify();
+  }
 }
 
 void ActiveTabPermissionGranter::WebContentsDestroyed() {