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/connection',
+   'mojo/public/js/core',
+   'content/public/renderer/frame_interfaces',
+  ], (textDetection, bindings, connection, mojo, interfaces) => {
+
+  class MockTextDetection {
+    constructor() {
+      interfaces.addInterfaceOverrideForTesting(
+          textDetection.TextDetection.name,
+          pipe => this.bindToPipe(pipe));
+    }
+
+    bindToPipe(pipe) {
+      this.stub_ = connection.bindHandleToStub(pipe,
+                                               textDetection.TextDetection);

[Reilly Grant (use Gerrit), 2016/12/23 02:24:28]

yzshen@ recently sent me a patch with a new API for doing bindings:
https://codereview.chromium.org/2594213002/

[xianglu, 2017/01/03 20:47:27]

Done.

+      bindings.StubBindings(this.stub_).delegate = this;
+    }
+
+    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();
+});