Revert of Use FrameIsAd to decide whether to isolate a frame in TopDocumentIsolation mode.

content/public/test/test_utils.cc

Index: content/public/test/test_utils.cc
diff --git a/content/public/test/test_utils.cc b/content/public/test/test_utils.cc
index 6e8493254b14efcd18733ac62b86b12e2c1373b5..cb8a3b0d80ee8d2b2aff43566326a845411789f5 100644
--- a/content/public/test/test_utils.cc
+++ b/content/public/test/test_utils.cc
@@ -4,9 +4,6 @@
 
 #include "content/public/test/test_utils.h"
 
-#include <map>
-#include <set>
-#include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ -30,7 +27,6 @@
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/process_type.h"
 #include "content/public/test/test_launcher.h"
@@ -234,14 +230,6 @@
       kFakeTrialName, kFakeTrialGroupName, param_values, command_line);
 }
 
-void EnableTopDocumentIsolationForTesting(base::CommandLine* command_line) {
-  EnableFeatureWithParam(
-      features::kTopDocumentIsolation, features::kTopDocumentIsolationModeParam,
-      std::to_string(
-          static_cast<int>(features::TopDocumentIsolationMode::CrossSite)),
-      command_line);
-}
-
 #if defined(OS_ANDROID)
 // Registers content/browser and mojo JNI bindings necessary for some types of
 // tests.