Introduce ActiveScriptController; track active extension scripts

extensions/common/permissions/permissions_data.cc

Index: extensions/common/permissions/permissions_data.cc
diff --git a/extensions/common/permissions/permissions_data.cc b/extensions/common/permissions/permissions_data.cc
index 95dce8ba8f8f4e684e0e1b525b48f7507bdf96fc..809865d46fafd862e15bff12e07a6504ab3331b7 100644
--- a/extensions/common/permissions/permissions_data.cc
+++ b/extensions/common/permissions/permissions_data.cc
@@ -560,6 +560,14 @@ bool PermissionsData::CanCaptureVisiblePage(const Extension* extension,
   return false;
 }
 
+// static
+bool PermissionsData::RequiresActionForScriptExecution(
+    const Extension* extension) {
+  // For now, the user should be notified when an extension with all hosts
+  // permission tries to execute a script on a page.
+  return HasEffectiveAccessToAllHosts(extension);
+}
+
 bool PermissionsData::ParsePermissions(Extension* extension,
                                        base::string16* error) {
   initial_required_permissions_.reset(new InitialPermissions);