Shape Detection: QR detection in Chrome Android using Play Services

chrome/android/java/src/org/chromium/chrome/browser/shapedetection/BarcodeDetectionFactory.java

Index: chrome/android/java/src/org/chromium/chrome/browser/shapedetection/BarcodeDetectionFactory.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/shapedetection/BarcodeDetectionFactory.java b/chrome/android/java/src/org/chromium/chrome/browser/shapedetection/BarcodeDetectionFactory.java
new file mode 100644
index 0000000000000000000000000000000000000000..c3c3e56426e4d65a5ebfaeb158421113aae3404c
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/shapedetection/BarcodeDetectionFactory.java
@@ -0,0 +1,39 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.shapedetection;
+
+import android.app.Activity;
+
+import org.chromium.blink.mojom.BarcodeDetection;
+import org.chromium.content.browser.ContentViewCore;
+import org.chromium.content_public.browser.WebContents;
+import org.chromium.services.service_manager.InterfaceFactory;
+import org.chromium.ui.base.WindowAndroid;
+
+/**
+ * Factory class registered to create BarcodeDetections upon request.
+ */
+public class BarcodeDetectionFactory implements InterfaceFactory<BarcodeDetection> {
+    private final WebContents mWebContents;
+
+    public BarcodeDetectionFactory(WebContents webContents) {
+        mWebContents = webContents;
+    }
+
+    @Override
+    public BarcodeDetection createImpl() {
+        // Get android.content.Context out of |mWebContents|.
+        final ContentViewCore contentViewCore = ContentViewCore.fromWebContents(mWebContents);
+        if (contentViewCore == null) return null;
+
+        final WindowAndroid window = contentViewCore.getWindowAndroid();
+        if (window == null) return null;
+
+        final Activity context = window.getActivity().get();
+        if (context == null) return null;
+
+        return new BarcodeDetectionImpl(context);
+    }
+}