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

extensions/browser/api/diagnostics/diagnostics_api.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/api/diagnostics/diagnostics_api.h"
 
 namespace {
 
 const char kErrorPingNotImplemented[] = "Not implemented";
 const char kErrorPingFailed[] = "Failed to send ping packet";
 }
 
 namespace extensions {
 
-namespace SendPacket = core_api::diagnostics::SendPacket;
+namespace SendPacket = api::diagnostics::SendPacket;
 
 DiagnosticsSendPacketFunction::DiagnosticsSendPacketFunction() {
 }
 
 DiagnosticsSendPacketFunction::~DiagnosticsSendPacketFunction() {
 }
 
 bool DiagnosticsSendPacketFunction::Prepare() {
   parameters_ = SendPacket::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(parameters_.get());
   return true;
 }
 
 bool DiagnosticsSendPacketFunction::Respond() {
   return error_.empty();
 }
 
 void DiagnosticsSendPacketFunction::OnCompleted(
     SendPacketResultCode result_code,
     const std::string& ip,
     double latency) {
   switch (result_code) {
     case SEND_PACKET_OK: {
-      core_api::diagnostics::SendPacketResult result;
+      api::diagnostics::SendPacketResult result;
       result.ip = ip;
       result.latency = latency;
       results_ = SendPacket::Results::Create(result);
       break;
     }
     case SEND_PACKET_NOT_IMPLEMENTED:
       SetError(kErrorPingNotImplemented);
       break;
     case SEND_PACKET_FAILED:
       SetError(kErrorPingFailed);
       break;
   }
   AsyncWorkCompleted();
 }
 
 }  // namespace extensions