[Android WebView] Upstream WebViewShell to chromium.

android_webview/tools/WebViewShell/src/org/chromium/webview_shell/StartupTimeActivity.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.os.Bundle;
+import android.os.SystemClock;
+import android.webkit.WebView;
+
+/**
+ * This activity is designed for startup time testing of the WebView.
+ */
+public class StartupTimeActivity extends Activity {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getWindow().setTitle(
+                getResources().getString(R.string.title_activity_startup_time));
+
+        long t1 = SystemClock.elapsedRealtime();
+        WebView webView = new WebView(this);
+        setContentView(webView);
+        long t2 = SystemClock.elapsedRealtime();
+        android.util.Log.i("WebViewShell", "WebViewStartupTimeMillis=" + (t2 - t1));
+    }
+
+}
+