Shape Detection: Add Text Detection in Chrome Android

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

+"use strict";
+
+let mockTextDetectionReady = define(
+  'mockTextDetection',
+  ['third_party/WebKit/public/platform/modules/shapedetection/textdetection.mojom',
+   'mojo/public/js/bindings',
+   'mojo/public/js/core',
+   'content/public/renderer/frame_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);
+      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();
+});