Support "always allow" for runtime script execution

chrome/browser/extensions/active_script_controller.cc

Index: chrome/browser/extensions/active_script_controller.cc
diff --git a/chrome/browser/extensions/active_script_controller.cc b/chrome/browser/extensions/active_script_controller.cc
index 1b35b2872c9415706f9bd7585315856576cdc57b..06d39609311faede03b78383f5517ffc923a26a1 100644
--- a/chrome/browser/extensions/active_script_controller.cc
+++ b/chrome/browser/extensions/active_script_controller.cc
@@ -13,19 +13,23 @@
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/location_bar_controller.h"
+#include "chrome/browser/extensions/permissions_updater.h"
 #include "chrome/browser/extensions/tab_helper.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_id.h"
 #include "chrome/common/extensions/api/extension_action/action_info.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
+#include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/feature_switch.h"
 #include "extensions/common/manifest.h"
+#include "extensions/common/permissions/permission_set.h"
 #include "extensions/common/permissions/permissions_data.h"
 #include "ipc/ipc_message_macros.h"
 
@@ -100,6 +104,38 @@ void ActiveScriptController::OnAdInjectionDetected(
       ad_injectors.size() - num_preventable_ad_injectors);
 }
 
+void ActiveScriptController::AddPersistedPermission(
+    const Extension* extension) {
+  // Allow current tab to run injection.
+  OnClicked(extension);
+
+  GURL url = web_contents()->GetVisibleURL();
+  extensions::URLPatternSet new_hosts;
+  URLPattern pattern(extensions::UserScript::ValidUserScriptSchemes());
+
+  pattern.SetScheme(url.scheme());
+  pattern.SetHost(url.host());
+  pattern.SetPath("/*");
+  new_hosts.AddPattern(pattern);
+
+  scoped_refptr<extensions::PermissionSet> new_permissions =
+      new extensions::PermissionSet(extensions::APIPermissionSet(),
+                                    extensions::ManifestPermissionSet(),
+                                    extensions::URLPatternSet(),
+                                    new_hosts);
+
+  // Update active permissions for the session.
+  extensions::PermissionsUpdater updater(
+      Profile::FromBrowserContext(web_contents()->GetBrowserContext()));
+  updater.AddPermissions(extension, new_permissions.get());
+
+  // Update persisted permissions for extension.
+  extensions::ExtensionPrefs* prefs =
+      extensions::ExtensionPrefs::Get(web_contents()->GetBrowserContext());
+  prefs->ClearPersistedPermissions(extension);
+  prefs->AddPersistedPermission(extension, &pattern);
+}
+
 ExtensionAction* ActiveScriptController::GetActionForExtension(
     const Extension* extension) {
   if (!enabled_ || pending_requests_.count(extension->id()) == 0)