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

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

 "use strict";
 
 let mockTextDetectionReady = define(
   'mockTextDetection',
   ['services/shape_detection/public/interfaces/textdetection.mojom',
    'mojo/public/js/bindings',
    'mojo/public/js/core',
    'content/public/renderer/interfaces',
   ], (textDetection, bindings, mojo, interfaces) => {
 
   class MockTextDetection {
     constructor() {
       this.bindingSet_ = new bindings.BindingSet(textDetection.TextDetection);
 
       interfaces.addInterfaceOverrideForTesting(
           textDetection.TextDetection.name,
           handle => this.bindingSet_.addBinding(this, handle));
     }
 
-    detect(frame_data, width, height) {
-      let receivedStruct = mojo.mapBuffer(frame_data, 0, width*height*4, 0);
+    detect(bitmap_data) {
+      let receivedStruct = new Uint8Array(bitmap_data.pixel_data);
       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 }
           },
           {
             raw_value : "dogs",
             bounding_box: { x: 2.0, y: 2.0, width: 50.0, height: 50.0 }
           },
         ],
       });
-      mojo.unmapBuffer(receivedStruct.buffer);
     }
 
     getFrameData() {
       return this.buffer_data_;
     }
   }
   return new MockTextDetection();
 });