Shapedetection module: Blink side implementation

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

+"use strict";
+
+let mockShapeDetectionReady = define(
+  'mockShapeDetection',
+  ['third_party/WebKit/public/platform/modules/shapedetection/shapedetection.mojom',
+   'mojo/public/js/bindings',
+   'mojo/public/js/connection',
+   'mojo/public/js/core',
+   'content/public/renderer/frame_interfaces',
+  ], (shapeDetection, bindings, connection, mojo, interfaces) => {
+
+  class MockShapeDetection {
+    constructor() {
+      interfaces.addInterfaceOverrideForTesting(
+          shapeDetection.ShapeDetection.name,
+          pipe => this.bindToPipe(pipe));
+    }
+
+    bindToPipe(pipe) {
+      this.stub_ = connection.bindHandleToStub(pipe,
+                                               shapeDetection.ShapeDetection);
+      bindings.StubBindings(this.stub_).delegate = this;
+    }
+
+    detectFace(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({
+        result: {
+          boundingBoxes: [
+              { x : 0.0, y: 0.0, width: 1.0, height: 1.0 },
+              { x : 0.0, y: 0.0, width: 0.8, height: 0.8 },
+              { x : 0.0, y: 0.0, width: 0.8, height: 0.5 },

[esprehn, 2016/10/04 01:01:44]

can we get some tests outside the [0, 1] range? You can do it in a follow up CL
though.

+          ]
+        }
+      });
+      mojo.unmapBuffer(receivedStruct.buffer);
+    }
+
+    getFrameData() {
+      return this.buffer_data_;
+    }
+  }
+  return new MockShapeDetection();
+});