REVERT: ShapeDetection: use mojom::Bitmap for mojo interface.

third_party/WebKit/LayoutTests/shapedetection/resources/mock-barcodedetection.js

 "use strict";
 
 let mockBarcodeDetectionReady = define(
   'mockBarcodeDetection',
   ['services/shape_detection/public/interfaces/barcodedetection.mojom',
    'mojo/public/js/bindings',
    'mojo/public/js/core',
    'content/public/renderer/interfaces',
   ], (barcodeDetection, bindings, mojo, interfaces) => {
 
   class MockBarcodeDetection {
     constructor() {
       this.bindingSet_ = new bindings.BindingSet(
           barcodeDetection.BarcodeDetection);
 
       interfaces.addInterfaceOverrideForTesting(
           barcodeDetection.BarcodeDetection.name,
           handle => this.bindingSet_.addBinding(this, handle));
     }
 
-    detect(bitmap_data) {
-      let receivedStruct = new Uint8Array(bitmap_data.pixel_data);
+    detect(frame_data, width, height) {
+      let receivedStruct = mojo.mapBuffer(frame_data, 0, width*height*4, 0);
       this.buffer_data_ = new Uint32Array(receivedStruct.buffer);
       return Promise.resolve({
         results: [
           {
             raw_value : "cats",
             bounding_box: { x: 1.0, y: 1.0, width: 100.0, height: 100.0 },
             corner_points: [
               { x: 1.0, y: 1.0 },
               { x: 101.0, y: 1.0 },
               { x: 101.0, y: 101.0 },
               { x: 1.0, y: 101.0 }
             ],
           },
           {
             raw_value : "dogs",
             bounding_box: { x: 2.0, y: 2.0, width: 50.0, height: 50.0 },
             corner_points: [
               { x: 2.0, y: 2.0 },
               { x: 52.0, y: 2.0 },
               { x: 52.0, y: 52.0 },
               { x: 2.0, y: 52.0 }
             ],
           },
         ],
       });
+      mojo.unmapBuffer(receivedStruct.buffer);
     }
 
     getFrameData() {
       return this.buffer_data_;
     }
   }
   return new MockBarcodeDetection();
 });