Convert tabs, windows, and extension APIs to feature system.

chrome/common/extensions/permission_feature.cc

Index: chrome/common/extensions/permission_feature.cc
diff --git a/chrome/common/extensions/permission_feature.cc b/chrome/common/extensions/permission_feature.cc
index f0931926c22b51b7cf20e3bd4de4a679feadddf0..92fb2d54e897856a1372f4161fb9b861436fba14 100644
--- a/chrome/common/extensions/permission_feature.cc
+++ b/chrome/common/extensions/permission_feature.cc
@@ -24,9 +24,22 @@ Feature::Availability PermissionFeature::IsAvailableToContext(
   if (availability != IS_AVAILABLE)
     return availability;
 
-  if (!extension->HasAPIPermission(name()))
+  // TODO(aa): Lame to check optional permissions too (instead of just currently
+  // active permissions), but schema_generated_bindings.js calls this at
+  // bindings setup time, not call time. So it doesn't react properly to changes
+  // after the bindings are setup.
+  ExtensionAPIPermission* permission =
+      ExtensionPermissionsInfo::GetInstance()->GetByName(name());
+  if (!permission)
     return NOT_PRESENT;
 
+  if (!extension->required_permission_set()->HasAPIPermission(
+          permission->id()) &&
+      !extension->optional_permission_set()->HasAPIPermission(
+          permission->id())) {
+    return NOT_PRESENT;
+  }
+
   return IS_AVAILABLE;
 }