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

extensions/browser/api/storage/storage_api_unittest.cc

Index: extensions/browser/api/storage/storage_api_unittest.cc
diff --git a/extensions/browser/api/storage/storage_api_unittest.cc b/extensions/browser/api/storage/storage_api_unittest.cc
index c5e04639caf95a05c454ee5fb133c38a2468f2d7..98f25f90be3d0a58b904849a103c78afb2d2cfb5 100644
--- a/extensions/browser/api/storage/storage_api_unittest.cc
+++ b/extensions/browser/api/storage/storage_api_unittest.cc
@@ -67,7 +67,7 @@ class StorageApiUnittest : public ApiUnitTest {
         base::StringPrintf("[\"local\", \"%s\"]", key.c_str()));
     if (!result.get())
       return testing::AssertionFailure() << "No result";
-    base::DictionaryValue* dict = NULL;
+    base::DictionaryValue* dict = nullptr;
     if (!result->GetAsDictionary(&dict))
       return testing::AssertionFailure() << result << " was not a dictionary.";
     if (!dict->GetString(key, value)) {