Barcode/Face detection: reject requests in platforms where not implemented

third_party/WebKit/Source/modules/shapedetection/ShapeDetector.h

 // Copyright 2016 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 ShapeDetector_h
 #define ShapeDetector_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/ModulesExport.h"
@@ skipping 39 matching lines @@
                                    ScriptPromiseResolver*,
                                    uint8_t* data,
                                    int size,
                                    int width,
                                    int height);
   void onDetectFaces(ScriptPromiseResolver*,
                      mojom::blink::FaceDetectionResultPtr);
   void onDetectBarcodes(ScriptPromiseResolver*,
                         Vector<mojom::blink::BarcodeDetectionResultPtr>);
 
+  // Error handlers for use if mojo service doesn't connect.
+  void onFaceServiceConnectionError();
+  void onBarcodeServiceConnectionError();
+
   mojom::blink::FaceDetectionPtr m_faceService;
   mojom::blink::BarcodeDetectionPtr m_barcodeService;
 
-  HeapHashSet<Member<ScriptPromiseResolver>> m_serviceRequests;
+  HeapHashSet<Member<ScriptPromiseResolver>> m_faceServiceRequests;
+  HeapHashSet<Member<ScriptPromiseResolver>> m_barcodeServiceRequests;
 
  protected:
   mojom::blink::FaceDetectorOptionsPtr m_faceDetectorOptions;
 };
 
 }  // namespace blink
 
 #endif  // ShapeDetector_h