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

extensions/browser/api/test/test_api.cc

Index: extensions/browser/api/test/test_api.cc
diff --git a/extensions/browser/api/test/test_api.cc b/extensions/browser/api/test/test_api.cc
index 23de740ebafd69114a6acefd1222bc76b6795f5b..689f91a9978bfed096e6c29f8c67adbd47e566f8 100644
--- a/extensions/browser/api/test/test_api.cc
+++ b/extensions/browser/api/test/test_api.cc
@@ -30,10 +30,10 @@ const char kNotTestProcessError[] =
 
 namespace extensions {
 
-namespace Log = core_api::test::Log;
-namespace NotifyFail = core_api::test::NotifyFail;
-namespace PassMessage = core_api::test::PassMessage;
-namespace WaitForRoundTrip = core_api::test::WaitForRoundTrip;
+namespace Log = api::test::Log;
+namespace NotifyFail = api::test::NotifyFail;
+namespace PassMessage = api::test::PassMessage;
+namespace WaitForRoundTrip = api::test::WaitForRoundTrip;
 
 TestExtensionFunction::~TestExtensionFunction() {}