ImageCapture: takePhoto() mock LayoutTest

third_party/WebKit/LayoutTests/imagecapture/resources/mock-imagecapture.js

+"use strict";
+
+let mockImageCaptureReady = define(
+  'mockImageCapture',
+  ['third_party/WebKit/public/platform/modules/imagecapture/image_capture.mojom',
+   'mojo/public/js/bindings',
+   'mojo/public/js/connection',
+   'content/public/renderer/service_registry',
+  ], (imageCapture, bindings, connection, serviceRegistry) => {
+
+  class MockImageCapture {
+    constructor() {
+      serviceRegistry.addServiceOverrideForTesting(
+          imageCapture.ImageCapture.name,
+          pipe => this.bindToPipe(pipe));
+    }
+
+    bindToPipe(pipe) {
+      this.stub_ = connection.bindHandleToStub(
+          pipe, imageCapture.ImageCapture);
+      bindings.StubBindings(this.stub_).delegate = this;
+    }
+
+    takePhoto(sourceid) {
+      return Promise.resolve({ mime_type : 'image/cat',
+                               data : "(,,,)=(^.^)=(,,,)" });
+    }
+  }
+  return new MockImageCapture();
+});