Run clang-modernize -use-nullptr over src/extensions/.

extensions/browser/info_map_unittest.cc

Index: extensions/browser/info_map_unittest.cc
diff --git a/extensions/browser/info_map_unittest.cc b/extensions/browser/info_map_unittest.cc
index 5dfe7ded96c5c710c9186f4b47bf74b1699f20ac..e1ccc8c9caa7921fb73d420398f14ebd0ff0c997 100644
--- a/extensions/browser/info_map_unittest.cc
+++ b/extensions/browser/info_map_unittest.cc
@@ -69,7 +69,7 @@ TEST_F(InfoMapTest, RefCounting) {
 
   // Release extension1, and the info map should have the only ref.
   const Extension* weak_extension1 = extension1.get();
-  extension1 = NULL;
+  extension1 = nullptr;
   EXPECT_TRUE(weak_extension1->HasOneRef());
 
   // Remove extension2, and the extension2 object should have the only ref.
@@ -78,7 +78,7 @@ TEST_F(InfoMapTest, RefCounting) {
   EXPECT_TRUE(extension2->HasOneRef());
 
   // Delete the info map, and the extension3 object should have the only ref.
-  info_map = NULL;
+  info_map = nullptr;
   EXPECT_TRUE(extension3->HasOneRef());
 }