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

extensions/browser/api/document_scan/document_scan_interface_chromeos.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_BROWSER_API_DOCUMENT_SCAN_DOCUMENT_SCAN_INTERFACE_CHROMEOS_H_
 #define EXTENSIONS_BROWSER_API_DOCUMENT_SCAN_DOCUMENT_SCAN_INTERFACE_CHROMEOS_H_
 
 #include "extensions/browser/api/document_scan/document_scan_interface.h"
 #include "chromeos/dbus/lorgnette_manager_client.h"
 
 namespace extensions {
 
-namespace core_api {
+namespace api {
 
 class DocumentScanInterfaceChromeos : public DocumentScanInterface {
  public:
   DocumentScanInterfaceChromeos();
   ~DocumentScanInterfaceChromeos() override;
 
   void ListScanners(const ListScannersResultsCallback& callback) override;
   void Scan(const std::string& scanner_name,
             ScanMode mode,
             int resolution_dpi,
@@ skipping 10 matching lines @@
                        bool succeeded,
                        const std::string& image_data);
   chromeos::LorgnetteManagerClient* GetLorgnetteManagerClient();
 
   // Guaranteed to outlive |this|.
   chromeos::LorgnetteManagerClient* lorgnette_manager_client_;
 
   DISALLOW_COPY_AND_ASSIGN(DocumentScanInterfaceChromeos);
 };
 
-}  // namespace core_api
+}  // namespace api
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_DOCUMENT_SCAN_DOCUMENT_SCAN_INTERFACE_CHROMEOS_H_