Revert of [tracing] Dump child processes' memory metrics in browser

chrome/test/base/tracing_browsertest.cc

Index: chrome/test/base/tracing_browsertest.cc
diff --git a/chrome/test/base/tracing_browsertest.cc b/chrome/test/base/tracing_browsertest.cc
index 6995606989dc1aeb51151f677f2ed677b203caf0..1b953594314f8d2b8f431892bd20ecf82643bd95 100644
--- a/chrome/test/base/tracing_browsertest.cc
+++ b/chrome/test/base/tracing_browsertest.cc
@@ -61,19 +61,9 @@
                                       MemoryDumpManager::kTraceCategory,
                                       event_name, 10));
 
-    // Create and destroy renderers while tracing is enabled.
-    GURL url2("chrome://credits");
+    GURL url2("chrome://credits/");
     ui_test_utils::NavigateToURLWithDisposition(
         browser(), url2, NEW_FOREGROUND_TAB,
-        ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
-    ASSERT_NO_FATAL_FAILURE(ExecuteJavascriptOnCurrentTab());
-
-    // Close the current tab.
-    browser()->tab_strip_model()->CloseSelectedTabs();
-
-    GURL url3("chrome://settings");
-    ui_test_utils::NavigateToURLWithDisposition(
-        browser(), url3, CURRENT_TAB,
         ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
     ASSERT_NO_FATAL_FAILURE(ExecuteJavascriptOnCurrentTab());