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

extensions/browser/api/declarative/declarative_api.cc

Index: extensions/browser/api/declarative/declarative_api.cc
diff --git a/extensions/browser/api/declarative/declarative_api.cc b/extensions/browser/api/declarative/declarative_api.cc
index 0a69a9b4163a62619e75dee3f899268f9e03f8d1..715c71c223f2eb5e9233b8265bf37105b62780db 100644
--- a/extensions/browser/api/declarative/declarative_api.cc
+++ b/extensions/browser/api/declarative/declarative_api.cc
@@ -23,12 +23,11 @@
 #include "extensions/common/extension_api.h"
 #include "extensions/common/permissions/permissions_data.h"
 
-using extensions::core_api::events::Rule;
-
-namespace AddRules = extensions::core_api::events::Event::AddRules;
-namespace GetRules = extensions::core_api::events::Event::GetRules;
-namespace RemoveRules = extensions::core_api::events::Event::RemoveRules;
+using extensions::api::events::Rule;
 
+namespace AddRules = extensions::api::events::Event::AddRules;
+namespace GetRules = extensions::api::events::Event::GetRules;
+namespace RemoveRules = extensions::api::events::Event::RemoveRules;
 
 namespace extensions {