Move enable extensions define to a build flag.

chrome/browser/browsing_data/cookies_tree_model_unittest.cc

Index: chrome/browser/browsing_data/cookies_tree_model_unittest.cc
diff --git a/chrome/browser/browsing_data/cookies_tree_model_unittest.cc b/chrome/browser/browsing_data/cookies_tree_model_unittest.cc
index 286862a8d83d842c1f5912c24d3f02f733f0deef..f8a9a29a3037b3374d60bd6c7ec753f81db40b73 100644
--- a/chrome/browser/browsing_data/cookies_tree_model_unittest.cc
+++ b/chrome/browser/browsing_data/cookies_tree_model_unittest.cc
@@ -32,11 +32,12 @@
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "extensions/features/features.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 #endif
 
@@ -49,7 +50,7 @@ class CookiesTreeModelTest : public testing::Test {
  public:
   ~CookiesTreeModelTest() override {
     // Avoid memory leaks.
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
     special_storage_policy_ = nullptr;
 #endif
     profile_.reset();
@@ -91,7 +92,7 @@ class CookiesTreeModelTest : public testing::Test {
             HostContentSettingsMapFactory::GetForProfile(profile_.get()),
             profile_->GetPrefs(),
             kExtensionScheme);
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
     special_storage_policy_ =
         new ExtensionSpecialStoragePolicy(cookie_settings.get());
 #endif
@@ -449,7 +450,7 @@ class CookiesTreeModelTest : public testing::Test {
 
  protected:
   ExtensionSpecialStoragePolicy* special_storage_policy() {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
     return special_storage_policy_.get();
 #else
     return nullptr;
@@ -485,7 +486,7 @@ class CookiesTreeModelTest : public testing::Test {
   scoped_refptr<MockBrowsingDataMediaLicenseHelper>
       mock_browsing_data_media_license_helper_;
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   scoped_refptr<ExtensionSpecialStoragePolicy> special_storage_policy_;
 #endif
 };