Shape Detection: Add Text Detection in Chrome Android

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

Index: chrome/android/java/src/org/chromium/chrome/browser/shapedetection/TextDetectionFactory.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/shapedetection/TextDetectionFactory.java b/chrome/android/java/src/org/chromium/chrome/browser/shapedetection/TextDetectionFactory.java
new file mode 100644
index 0000000000000000000000000000000000000000..ff32480b928c22b84b95a580e35557769111be4a
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/shapedetection/TextDetectionFactory.java
@@ -0,0 +1,40 @@
+// Copyright 2017 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.TextDetection;
+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 TextDetections upon request.
+ */
+public class TextDetectionFactory implements InterfaceFactory<TextDetection> {
+    private final WebContents mWebContents;
+
+    public TextDetectionFactory(WebContents webContents) {
+        mWebContents = webContents;
+    }
+
+    @Override
+    public TextDetection 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 TextDetectionImpl(context);
+    }
+}