bluetooth: Move Bluetooth-related Blink API headers into their own directory.

public/platform/WebBluetooth.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 WebBluetooth_h
-#define WebBluetooth_h
-
-#include "public/platform/WebCallbacks.h"
-
-namespace blink {
-
-struct WebBluetoothDevice;
-struct WebBluetoothError;
-
-// Success and failure callbacks for requestDevice.
-// WebBluetoothDevice and WebBluetoothError object ownership is transfered.
-typedef WebCallbacks<WebBluetoothDevice, WebBluetoothError> WebBluetoothRequestDeviceCallbacks;
-
-class WebBluetooth {
-public:
-    virtual ~WebBluetooth() { }
-
-    // Requests a bluetooth device.
-    // WebBluetoothRequestDeviceCallbacks ownership transferred to the client.
-    virtual void requestDevice(WebBluetoothRequestDeviceCallbacks*) = 0;
-};
-
-} // namespace blink
-
-#endif // WebBluetooth_h
+// TODO(ortuno): Will be removed in https://crrev.com/1060643002
+#include "public/platform/modules/bluetooth/WebBluetooth.h"