Generate all extension schema namespaces as "api" and instead vary the generated bundle names.

extensions/browser/api/declarative/rules_registry.h

Index: extensions/browser/api/declarative/rules_registry.h
diff --git a/extensions/browser/api/declarative/rules_registry.h b/extensions/browser/api/declarative/rules_registry.h
index f8c94929024d65f94b4d092c5dcda42dfc888ae5..86458a013e82b931e8250f6d2fbe794a64659bfa 100644
--- a/extensions/browser/api/declarative/rules_registry.h
+++ b/extensions/browser/api/declarative/rules_registry.h
@@ -40,7 +40,7 @@ class RulesCacheDelegate;
 // in the RulesCacheDelegate object.
 class RulesRegistry : public base::RefCountedThreadSafe<RulesRegistry> {
  public:
-  typedef extensions::core_api::events::Rule Rule;
+  typedef extensions::api::events::Rule Rule;
 
   enum Defaults { DEFAULT_PRIORITY = 100 };
   // After the RulesCacheDelegate object (the part of the registry which runs on