Move enable extensions define to a build flag.

chrome/browser/browsing_data/browsing_data_counter_utils_unittest.cc

Index: chrome/browser/browsing_data/browsing_data_counter_utils_unittest.cc
diff --git a/chrome/browser/browsing_data/browsing_data_counter_utils_unittest.cc b/chrome/browser/browsing_data/browsing_data_counter_utils_unittest.cc
index c465720c3979271a1b651e8fd5eab85da4a16230..dc5e7d170c824003b0ebc2f71d20109d585ccdd0 100644
--- a/chrome/browser/browsing_data/browsing_data_counter_utils_unittest.cc
+++ b/chrome/browser/browsing_data/browsing_data_counter_utils_unittest.cc
@@ -13,9 +13,10 @@
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "extensions/features/features.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "base/strings/string_split.h"
 #include "chrome/browser/browsing_data/hosted_apps_counter.h"
 #endif
@@ -32,7 +33,7 @@ class BrowsingDataCounterUtilsTest : public testing::Test {
   TestingProfile profile_;
 };
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 // Tests the complex output of the hosted apps counter.
 TEST_F(BrowsingDataCounterUtilsTest, HostedAppsCounterResult) {
   HostedAppsCounter counter(GetProfile());