Add browser test for WebUI URL logging

chrome/browser/ui/webui/log_web_ui_url_browsertest.cc

+// 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.
+
+#include "chrome/browser/ui/webui/log_web_ui_url.h"
+
+#include <vector>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/callback.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_commands.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "url/gurl.h"
+
+namespace webui {
+
+class LogWebUIUrlTest : public InProcessBrowserTest {
+ public:
+  LogWebUIUrlTest() {
+    SetHashFunctionForTesting(
+        base::Bind(&LogWebUIUrlTest::Hash, base::Unretained(this)));
+  }
+
+  ~LogWebUIUrlTest() override {
+    SetHashFunctionForTesting(WebUIUrlHash());
+  }
+
+  const std::vector<GURL>& logged_urls() { return logged_urls_; }
+
+ private:
+  uint32 Hash(const GURL& web_ui_url) {
+    logged_urls_.push_back(web_ui_url);
+    return 0;
+  }
+
+  std::vector<GURL> logged_urls_;
+
+  DISALLOW_COPY_AND_ASSIGN(LogWebUIUrlTest);
+};
+
+IN_PROC_BROWSER_TEST_F(LogWebUIUrlTest, ExtensionLoadAndSendPolicy) {
+  ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUIDownloadsURL));
+  EXPECT_EQ(1U, logged_urls().size());
+  EXPECT_EQ(GURL("chrome://downloads"), logged_urls()[0]);
+
+  chrome::Reload(browser(), CURRENT_TAB);
+  EXPECT_EQ(2U, logged_urls().size());
+  EXPECT_EQ(GURL("chrome://downloads"), logged_urls()[1]);
+}
+
+// TODO(dbeam): test an uber page URL like chrome://history.
+
+}  // namespace webui