Reland "Refactor ContentViewClient (4/6)"

content/shell/android/java/src/org/chromium/content_shell/ShellViewAndroidDelegate.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_shell;
+
+import android.content.Intent;
+import android.view.ViewGroup;
+
+import org.chromium.ui.base.ViewAndroidDelegate;
+
+/**
+ * Implementation of the abstract class {@link ViewAndroidDelegate} for content shell.
+ * Extended for testing.
+ */
+public class ShellViewAndroidDelegate extends ViewAndroidDelegate {
+    private final ViewGroup mContainerView;
+    private ContentIntentHandler mContentIntentHandler;
+
+    /**
+     * Interface used to define/modify what {@link #startContentIntent} does.
+     */
+    public interface ContentIntentHandler {
+        /**
+         * Called when intent url from content is received.
+         * @param intentUrl intent url.
+         */
+        void onIntentUrlReceived(String intentUrl);
+    }
+
+    public ShellViewAndroidDelegate(ViewGroup containerView) {
+        mContainerView = containerView;
+    }
+
+    /**
+     * Set the {@link ContentIntentHandler} for {@link #starContentIntent}.
+     * @param handler Handler to inject to {@link #startContentIntent}.
+     */
+    public void setContentIntentHandler(ContentIntentHandler handler) {
+        mContentIntentHandler = handler;
+    }
+
+    @Override
+    public void startContentIntent(Intent intent, String intentUrl, boolean isMainFrame) {
+        if (mContentIntentHandler != null) mContentIntentHandler.onIntentUrlReceived(intentUrl);
+    }
+
+    @Override
+    public ViewGroup getContainerView() {
+        return mContainerView;
+    }
+}