Associate a main resource request with its PageLoadTracker.

chrome/browser/page_load_metrics/page_load_metrics_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 "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/test/histogram_tester.h"
 #include "base/time/time.h"
 #include "chrome/browser/page_load_metrics/metrics_web_contents_observer.h"
 #include "chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h"
@@ skipping 31 matching lines @@
   void NavigateToUntrackedUrl() {
     ui_test_utils::NavigateToURL(browser(), GURL(url::kAboutBlankURL));
   }
 
   bool NoPageLoadMetricsRecorded() {
     return histogram_tester_.GetTotalCountsForPrefix("PageLoad.").empty();
   }
 
   base::HistogramTester histogram_tester_;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(PageLoadMetricsBrowserTest);
 };
 
 void FailAllNetworkTransactions(net::URLRequestContextGetter* getter) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   net::HttpCache* cache(
       getter->GetURLRequestContext()->http_transaction_factory()->GetCache());
   DCHECK(cache);
   std::unique_ptr<net::FailingHttpTransactionFactory> factory(
       new net::FailingHttpTransactionFactory(cache->GetSession(),
@@ skipping 16 matching lines @@
   NavigateToUntrackedUrl();
 
   histogram_tester_.ExpectTotalCount(internal::kHistogramDomContentLoaded, 1);
   histogram_tester_.ExpectTotalCount(internal::kHistogramLoad, 1);
   histogram_tester_.ExpectTotalCount(internal::kHistogramFirstLayout, 1);
   histogram_tester_.ExpectTotalCount(internal::kHistogramParseDuration, 1);
   histogram_tester_.ExpectTotalCount(
       internal::kHistogramParseBlockedOnScriptLoad, 1);
   histogram_tester_.ExpectTotalCount(
       internal::kHistogramParseBlockedOnScriptExecution, 1);
+  histogram_tester_.ExpectTotalCount(internal::kHistogramTotalBytes, 1);
 
   // Verify that NoPageLoadMetricsRecorded returns false when PageLoad metrics
   // have been recorded.
   EXPECT_FALSE(NoPageLoadMetricsRecorded());
 }
 
 IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, SamePageNavigation) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ui_test_utils::NavigateToURL(browser(),
@@ skipping 444 matching lines @@
 
   histogram_tester_.ExpectTotalCount(internal::kHistogramFirstContentfulPaint,
                                      1);
   histogram_tester_.ExpectTotalCount(
       "PageLoad.CSSTiming.Parse.BeforeFirstContentfulPaint", 1);
   histogram_tester_.ExpectTotalCount(
       "PageLoad.CSSTiming.Update.BeforeFirstContentfulPaint", 1);
   histogram_tester_.ExpectTotalCount(
       "PageLoad.CSSTiming.ParseAndUpdate.BeforeFirstContentfulPaint", 1);
 }
+
+IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PayloadSize) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  ui_test_utils::NavigateToURL(browser(), embedded_test_server()->GetURL(
+                                              "/page_load_metrics/large.html"));
+  NavigateToUntrackedUrl();
+
+  histogram_tester_.ExpectTotalCount(internal::kHistogramTotalBytes, 1);
+
+  // Verify that there is a single sample recorded in the 10kB bucket (the size
+  // of the main HTML response).
+  histogram_tester_.ExpectBucketCount(internal::kHistogramTotalBytes, 10, 1);
+}