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

extensions/browser/api/usb/usb_api.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_USB_USB_API_H_
 #define EXTENSIONS_BROWSER_API_USB_USB_API_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 27 matching lines @@
   DevicePermissionsManager* device_permissions_manager_;
   scoped_refptr<DevicePermissionEntry> permission_entry_;
 };
 
 class UsbConnectionFunction : public UIThreadExtensionFunction {
  protected:
   UsbConnectionFunction();
   ~UsbConnectionFunction() override;
 
   scoped_refptr<device::UsbDeviceHandle> GetDeviceHandle(
-      const extensions::core_api::usb::ConnectionHandle& handle);
+      const extensions::api::usb::ConnectionHandle& handle);
   void ReleaseDeviceHandle(
-      const extensions::core_api::usb::ConnectionHandle& handle);
+      const extensions::api::usb::ConnectionHandle& handle);
 };
 
 class UsbTransferFunction : public UsbConnectionFunction {
  protected:
   UsbTransferFunction();
   ~UsbTransferFunction() override;
 
   void OnCompleted(device::UsbTransferStatus status,
                    scoped_refptr<net::IOBuffer> data,
                    size_t length);
@@ skipping 276 matching lines @@
   UsbResetDeviceFunction();
 
  private:
   ~UsbResetDeviceFunction() override;
 
   // ExtensionFunction:
   ResponseAction Run() override;
 
   void OnComplete(bool success);
 
-  scoped_ptr<extensions::core_api::usb::ResetDevice::Params> parameters_;
+  scoped_ptr<extensions::api::usb::ResetDevice::Params> parameters_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbResetDeviceFunction);
 };
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_USB_USB_API_H_