Implement chrome://view-http-cache with network service.

content/browser/webui/web_ui_browsertest.cc

+// 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.
+
+#include "content/public/common/url_constants.h"
+#include "content/public/test/browser_test_utils.h"
+#include "content/public/test/content_browser_test.h"
+#include "content/public/test/content_browser_test_utils.h"
+#include "content/shell/browser/shell.h"
+#include "net/test/embedded_test_server/embedded_test_server.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+using WebUIBrowserTest = ContentBrowserTest;
+
+IN_PROC_BROWSER_TEST_F(WebUIBrowserTest, ViewCache) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+  NavigateToURL(shell(), embedded_test_server()->GetURL("/simple_page.html"));
+  int result = -1;
+  NavigateToURL(shell(), GURL(kChromeUINetworkViewCacheURL));
+  std::string script(
+      "document.documentElement.innerHTML.indexOf('simple_page.html')");
+  ASSERT_TRUE(ExecuteScriptAndExtractInt(
+      shell()->web_contents(), "domAutomationController.send(" + script + ")",
+      &result));
+  ASSERT_NE(-1, result);
+}
+
+}  // namespace content