[Page Load Metrics] PageLoadMetrics Mojofication.

chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc

Index: chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc b/chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc
index bf18d3bdbefce717fbc9704108cca9cfbb298720..57e3b3ea0f6354e84656c09afbaf53552233374f 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc
+++ b/chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc
@@ -7,6 +7,7 @@
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/test/histogram_tester.h"
+#include "base/test/scoped_feature_list.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "chrome/browser/page_load_metrics/metrics_web_contents_observer.h"
@@ -21,7 +22,7 @@
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_navigator_params.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
-#include "chrome/common/page_load_metrics/page_load_metrics_messages.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ -44,6 +45,8 @@
 #include "net/url_request/url_request_context_getter.h"
 
 namespace {
+using IPCType =
+    page_load_metrics::MetricsWebContentsObserver::TestingObserver::IPCType;
 
 void FailAllNetworkTransactions(net::URLRequestContextGetter* getter) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
@@ -192,14 +195,81 @@ class PageLoadMetricsWaiter
 
 using TimingField = PageLoadMetricsWaiter::TimingField;
 
+class IPCTypeVerifier
+    : public page_load_metrics::MetricsWebContentsObserver::TestingObserver {
+ public:
+  explicit IPCTypeVerifier(content::WebContents* web_contents)
+      : TestingObserver(web_contents) {}
+
+  ~IPCTypeVerifier() override { AssertValidUpdateState(); }
+
+  void ExpectNoTimingUpdates() { expect_updates_ = false; }
+
+  void DidReceiveTimingUpdate(IPCType type) override {
+    ++num_updates_;
+    const bool is_mojo_enabled =
+        base::FeatureList::IsEnabled(features::kPageLoadMetricsMojofication);
+    switch (type) {
+      case IPCType::LEGACY:
+        ASSERT_FALSE(is_mojo_enabled);
+        break;
+      case IPCType::MOJO:
+        ASSERT_TRUE(is_mojo_enabled);
+        break;
+      default:
+        FAIL() << "Unknown IPCType";
+        break;
+    }
+  }
+
+ private:
+  void AssertValidUpdateState() {
+    ASSERT_EQ(expect_updates_, num_updates_ > 0);
+  }
+
+  bool expect_updates_ = true;
+  int num_updates_ = 0;
+};
+
 }  // namespace
 
-class PageLoadMetricsBrowserTest : public InProcessBrowserTest {
+class PageLoadMetricsBrowserTest : public InProcessBrowserTest,
+                                   public testing::WithParamInterface<IPCType> {
  public:
   PageLoadMetricsBrowserTest() {}
   ~PageLoadMetricsBrowserTest() override {}
 
  protected:
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    InProcessBrowserTest::SetUpCommandLine(command_line);
+
+    // We need to set the feature state before the render process is created,
+    // in order for it to inherit the feature state from the browser process.
+    // SetUp() runs too early, and SetUpOnMainThread() runs too late.
+    const IPCType ipc_type = GetParam();
+    switch (ipc_type) {
+      case IPCType::LEGACY:
+        scoped_feature_list_.InitAndDisableFeature(
+            features::kPageLoadMetricsMojofication);
+        break;
+      case IPCType::MOJO:
+        scoped_feature_list_.InitAndEnableFeature(
+            features::kPageLoadMetricsMojofication);
+        break;
+      default:
+        CHECK(false) << "Unknown IPCType.";
+        break;
+    }
+  }
+
+  void SetUpOnMainThread() override {
+    InProcessBrowserTest::SetUpOnMainThread();
+
+    content::WebContents* web_contents =
+        browser()->tab_strip_model()->GetActiveWebContents();
+    ipc_type_verifier_ = base::MakeUnique<IPCTypeVerifier>(web_contents);
+  }
+
   // Force navigation to a new page, so the currently tracked page load runs its
   // OnComplete callback. You should prefer to use PageLoadMetricsWaiter, and
   // only use NavigateToUntrackedUrl for cases where the waiter isn't
@@ -225,18 +295,23 @@ class PageLoadMetricsBrowserTest : public InProcessBrowserTest {
     return base::MakeUnique<PageLoadMetricsWaiter>(web_contents);
   }
 
+  void ExpectNoTimingUpdates() { ipc_type_verifier_->ExpectNoTimingUpdates(); }
+
+  base::test::ScopedFeatureList scoped_feature_list_;
   base::HistogramTester histogram_tester_;
+  std::unique_ptr<IPCTypeVerifier> ipc_type_verifier_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PageLoadMetricsBrowserTest);
 };
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoNavigation) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NoNavigation) {
+  ExpectNoTimingUpdates();
   ASSERT_TRUE(embedded_test_server()->Start());
   EXPECT_TRUE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NewPage) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NewPage) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -267,7 +342,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NewPage) {
   EXPECT_FALSE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoPaintForEmptyDocument) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NoPaintForEmptyDocument) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -285,7 +360,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoPaintForEmptyDocument) {
                                      0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest,
                        NoPaintForEmptyDocumentInChildFrame) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
@@ -308,7 +383,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
                                      0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PaintInChildFrame) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, PaintInChildFrame) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   GURL a_url(embedded_test_server()->GetURL("/page_load_metrics/iframe.html"));
@@ -325,7 +400,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PaintInChildFrame) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramFirstPaint, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PaintInMultipleChildFrames) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, PaintInMultipleChildFrames) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   GURL a_url(embedded_test_server()->GetURL("/page_load_metrics/iframes.html"));
@@ -343,7 +418,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PaintInMultipleChildFrames) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramFirstPaint, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PaintInMainAndChildFrame) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, PaintInMainAndChildFrame) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   GURL a_url(embedded_test_server()->GetURL(
@@ -364,7 +439,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PaintInMainAndChildFrame) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramFirstPaint, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, SameDocumentNavigation) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, SameDocumentNavigation) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -388,7 +463,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, SameDocumentNavigation) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramFirstLayout, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, SameUrlNavigation) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, SameUrlNavigation) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -415,33 +490,36 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, SameUrlNavigation) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramFirstLayout, 2);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NonHtmlMainResource) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NonHtmlMainResource) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ui_test_utils::NavigateToURL(browser(),
                                embedded_test_server()->GetURL("/circle.svg"));
   NavigateToUntrackedUrl();
+  ExpectNoTimingUpdates();
   EXPECT_TRUE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NonHttpOrHttpsUrl) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NonHttpOrHttpsUrl) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUIVersionURL));
   NavigateToUntrackedUrl();
+  ExpectNoTimingUpdates();
   EXPECT_TRUE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, HttpErrorPage) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, HttpErrorPage) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ui_test_utils::NavigateToURL(
       browser(), embedded_test_server()->GetURL("/page_load_metrics/404.html"));
   NavigateToUntrackedUrl();
+  ExpectNoTimingUpdates();
   EXPECT_TRUE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, ChromeErrorPage) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, ChromeErrorPage) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   // Configure the network stack to fail all attempted loads with a network
@@ -456,19 +534,21 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, ChromeErrorPage) {
   ui_test_utils::NavigateToURL(browser(),
                                embedded_test_server()->GetURL("/title1.html"));
   NavigateToUntrackedUrl();
+  ExpectNoTimingUpdates();
   EXPECT_TRUE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, Ignore204Pages) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, Ignore204Pages) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ui_test_utils::NavigateToURL(browser(),
                                embedded_test_server()->GetURL("/page204.html"));
   NavigateToUntrackedUrl();
+  ExpectNoTimingUpdates();
   EXPECT_TRUE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, IgnoreDownloads) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, IgnoreDownloads) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   base::ThreadRestrictions::ScopedAllowIO allow_io;
@@ -486,10 +566,11 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, IgnoreDownloads) {
   downloads_observer.WaitForFinished();
 
   NavigateToUntrackedUrl();
+  ExpectNoTimingUpdates();
   EXPECT_TRUE(NoPageLoadMetricsRecorded());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PreloadDocumentWrite) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, PreloadDocumentWrite) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -504,7 +585,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PreloadDocumentWrite) {
       internal::kHistogramDocWriteParseStartToFirstContentfulPaint, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoPreloadDocumentWrite) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NoPreloadDocumentWrite) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -520,7 +601,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoPreloadDocumentWrite) {
       internal::kHistogramDocWriteParseStartToFirstContentfulPaint, 0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoDocumentWrite) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NoDocumentWrite) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -539,7 +620,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoDocumentWrite) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramDocWriteBlockCount, 0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteBlock) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, DocumentWriteBlock) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -555,7 +636,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteBlock) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramDocWriteBlockCount, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteReload) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, DocumentWriteReload) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -599,7 +680,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteReload) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramDocWriteBlockCount, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteAsync) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, DocumentWriteAsync) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -616,7 +697,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteAsync) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramDocWriteBlockCount, 0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteSameDomain) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, DocumentWriteSameDomain) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -633,7 +714,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, DocumentWriteSameDomain) {
   histogram_tester_.ExpectTotalCount(internal::kHistogramDocWriteBlockCount, 0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoDocumentWriteScript) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, NoDocumentWriteScript) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -656,7 +737,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoDocumentWriteScript) {
 #else
 #define MAYBE_BadXhtml BadXhtml
 #endif
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, MAYBE_BadXhtml) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, MAYBE_BadXhtml) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -691,7 +772,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, MAYBE_BadXhtml) {
 // Test code that aborts provisional navigations.
 // TODO(csharrison): Move these to unit tests once the navigation API in content
 // properly calls NavigationHandle/NavigationThrottle methods.
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, AbortNewNavigation) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, AbortNewNavigation) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   GURL url(embedded_test_server()->GetURL("/title1.html"));
@@ -715,7 +796,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, AbortNewNavigation) {
       internal::kHistogramAbortNewNavigationBeforeCommit, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, AbortReload) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, AbortReload) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   GURL url(embedded_test_server()->GetURL("/title1.html"));
@@ -743,7 +824,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, AbortReload) {
 #else
 #define MAYBE_AbortClose AbortClose
 #endif
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, MAYBE_AbortClose) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, MAYBE_AbortClose) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   GURL url(embedded_test_server()->GetURL("/title1.html"));
@@ -760,9 +841,10 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, MAYBE_AbortClose) {
 
   histogram_tester_.ExpectTotalCount(internal::kHistogramAbortCloseBeforeCommit,
                                      1);
+  ExpectNoTimingUpdates();
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, AbortMultiple) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, AbortMultiple) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   GURL url(embedded_test_server()->GetURL("/title1.html"));
@@ -796,7 +878,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, AbortMultiple) {
       internal::kHistogramAbortNewNavigationBeforeCommit, 2);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest,
                        NoAbortMetricsOnClientRedirect) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
@@ -829,7 +911,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
                   .empty());
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest,
                        FirstMeaningfulPaintRecorded) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
@@ -848,7 +930,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
       internal::kHistogramParseStartToFirstMeaningfulPaint, 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest,
                        FirstMeaningfulPaintNotRecorded) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
@@ -874,7 +956,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
       internal::kHistogramParseStartToFirstMeaningfulPaint, 0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest,
                        NoStatePrefetchObserverCacheable) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
@@ -892,7 +974,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
       "Prerender.none_PrefetchTTFCP.Reference.Cacheable.Visible", 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest,
                        NoStatePrefetchObserverNoStore) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
@@ -910,7 +992,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
       "Prerender.none_PrefetchTTFCP.Reference.Cacheable.Visible", 0);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, CSSTiming) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, CSSTiming) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -934,7 +1016,7 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, CSSTiming) {
       "PageLoad.CSSTiming.ParseAndUpdate.BeforeFirstContentfulPaint", 1);
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PayloadSize) {
+IN_PROC_BROWSER_TEST_P(PageLoadMetricsBrowserTest, PayloadSize) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   auto waiter = CreatePageLoadMetricsWaiter();
@@ -953,3 +1035,8 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, PayloadSize) {
   // of the main HTML response).
   histogram_tester_.ExpectBucketCount(internal::kHistogramTotalBytes, 10, 1);
 }
+
+INSTANTIATE_TEST_CASE_P(
+    /* no prefix */,
+    PageLoadMetricsBrowserTest,
+    testing::Values(IPCType::LEGACY, IPCType::MOJO));