Add Android implementation of navigator.getInstalledRelatedApps.

content/public/android/java/src/org/chromium/content/browser/installedapp/InstalledAppProviderFactory.java

+// 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.content.browser.installedapp;
+
+import org.chromium.base.ContextUtils;
+import org.chromium.content_public.browser.RenderFrameHost;
+import org.chromium.installedapp.mojom.InstalledAppProvider;
+import org.chromium.services.service_manager.InterfaceFactory;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+
+/** Factory to create instances of the InstalledAppProvider Mojo service. */
+public class InstalledAppProviderFactory implements InterfaceFactory<InstalledAppProvider> {
+    private final FrameUrlDelegateImpl mFrameUrlDelegate;
+
+    private static final class FrameUrlDelegateImpl
+            implements InstalledAppProviderImpl.FrameUrlDelegate {
+        private final RenderFrameHost mRenderFrameHost;
+
+        public FrameUrlDelegateImpl(RenderFrameHost renderFrameHost) {
+            mRenderFrameHost = renderFrameHost;
+        }
+
+        @Override
+        public URI getUrl() {
+            String url = mRenderFrameHost.getLastCommittedURL();
+            if (url == null) return null;
+
+            try {
+                return new URI(url);
+            } catch (URISyntaxException e) {
+                throw new AssertionError(e);
+            }
+        }
+    }
+
+    public InstalledAppProviderFactory(RenderFrameHost renderFrameHost) {
+        mFrameUrlDelegate = new FrameUrlDelegateImpl(renderFrameHost);
+    }
+
+    @Override
+    public InstalledAppProvider createImpl() {
+        return new InstalledAppProviderImpl(
+                mFrameUrlDelegate, ContextUtils.getApplicationContext());
+    }
+}