[Android WebView] Upstream WebViewShell to chromium.

android_webview/tools/WebViewShell/src/org/chromium/webview_shell/JankActivity.java

+// Copyright 2015 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.webview_shell;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.webkit.CookieManager;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+
+/**
+ * This activity is designed for Android Jank testing of WebView. It takes a URL as an argument, and
+ * displays the page ready for the Jank tester to test scrolling etc.
+ */
+public class JankActivity extends Activity {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getWindow().setTitle(
+                getResources().getString(R.string.title_activity_jank));
+        setContentView(R.layout.activity_webview);
+
+        WebView webView = (WebView) findViewById(R.id.webview);
+        CookieManager.setAcceptFileSchemeCookies(true);
+
+        webView.setWebViewClient(new WebViewClient() {
+            @Override
+            public boolean shouldOverrideUrlLoading(WebView webView, String url) {
+                return false;
+            }
+        });
+
+        String url = getUrlFromIntent(getIntent());
+        webView.loadUrl(url);
+    }
+
+    private static String getUrlFromIntent(Intent intent) {
+        return intent != null ? intent.getDataString() : null;
+    }
+
+}