page_load_metrics symbolic constants refactor

chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc

 // Copyright (c) 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 "base/test/histogram_tester.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/page_load_metrics/browser/metrics_web_contents_observer.h"
 #include "net/test/spawned_test_server/spawned_test_server.h"
 
 namespace page_load_metrics {
 
 class MetricsWebContentsObserverBrowserTest : public InProcessBrowserTest {
  public:
   MetricsWebContentsObserverBrowserTest(){};
   ~MetricsWebContentsObserverBrowserTest() override{};
 
  protected:
   base::HistogramTester histogram_tester_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsWebContentsObserverBrowserTest);
 };
 
 IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest, NoNavigation) {
   ASSERT_TRUE(test_server()->Start());
 
-  histogram_tester_.ExpectTotalCount(kHistogramNameDomContent, 0);
-  histogram_tester_.ExpectTotalCount(kHistogramNameLoad, 0);
-  histogram_tester_.ExpectTotalCount(kHistogramNameFirstLayout, 0);
+  histogram_tester_.ExpectTotalCount(kHistogramDomContentLoaded, 0);
+  histogram_tester_.ExpectTotalCount(kHistogramLoad, 0);
+  histogram_tester_.ExpectTotalCount(kHistogramFirstLayout, 0);
 }
 
 IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest, NewPage) {
   ASSERT_TRUE(test_server()->Start());
 
   ui_test_utils::NavigateToURL(browser(),
                                test_server()->GetURL("/title1.html"));
   ui_test_utils::NavigateToURL(browser(),
                                test_server()->GetURL("/title2.html"));
 
-  histogram_tester_.ExpectTotalCount(kHistogramNameDomContent, 1);
-  histogram_tester_.ExpectTotalCount(kHistogramNameLoad, 1);
-  histogram_tester_.ExpectTotalCount(kHistogramNameFirstLayout, 1);
+  histogram_tester_.ExpectTotalCount(kHistogramDomContentLoaded, 1);
+  histogram_tester_.ExpectTotalCount(kHistogramLoad, 1);
+  histogram_tester_.ExpectTotalCount(kHistogramFirstLayout, 1);
 }
 
 IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest, AnchorLink) {
   ASSERT_TRUE(test_server()->Start());
 
   ui_test_utils::NavigateToURL(browser(),
                                test_server()->GetURL("/title1.html"));
   ui_test_utils::NavigateToURL(browser(),
                                test_server()->GetURL("/title1.html#hash"));
   ui_test_utils::NavigateToURL(browser(),
                                test_server()->GetURL("/title2.html"));
 
-  histogram_tester_.ExpectTotalCount(kHistogramNameDomContent, 1);
-  histogram_tester_.ExpectTotalCount(kHistogramNameLoad, 1);
-  histogram_tester_.ExpectTotalCount(kHistogramNameFirstLayout, 1);
+  histogram_tester_.ExpectTotalCount(kHistogramDomContentLoaded, 1);
+  histogram_tester_.ExpectTotalCount(kHistogramLoad, 1);
+  histogram_tester_.ExpectTotalCount(kHistogramFirstLayout, 1);
 }
 
 }  // namespace page_load_metrics