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

extensions/common/manifest_test.cc

Index: extensions/common/manifest_test.cc
diff --git a/extensions/common/manifest_test.cc b/extensions/common/manifest_test.cc
index b1ab11551c0dc5e99593ae489918f1b96f2ec71d..9dbe3c2ac2b88c88b4b84049255ea97f1074c8b2 100644
--- a/extensions/common/manifest_test.cc
+++ b/extensions/common/manifest_test.cc
@@ -27,8 +27,8 @@ base::DictionaryValue* LoadManifestFile(const base::FilePath& manifest_path,
       "Couldn't find " << manifest_path.value();
 
   JSONFileValueSerializer serializer(manifest_path);
-  base::DictionaryValue* manifest =
-      static_cast<base::DictionaryValue*>(serializer.Deserialize(NULL, error));
+  base::DictionaryValue* manifest = static_cast<base::DictionaryValue*>(
+      serializer.Deserialize(nullptr, error));
 
   // Most unit tests don't need localization, and they'll fail if we try to
   // localize them, since their manifests don't have a default_locale key.
@@ -54,7 +54,7 @@ ManifestTest::~ManifestTest() {
 // Helper class that simplifies creating methods that take either a filename
 // to a manifest or the manifest itself.
 ManifestTest::ManifestData::ManifestData(const char* name)
-    : name_(name), manifest_(NULL) {
+    : name_(name), manifest_(nullptr) {
 }
 
 ManifestTest::ManifestData::ManifestData(base::DictionaryValue* manifest,
@@ -107,7 +107,7 @@ scoped_refptr<Extension> ManifestTest::LoadExtension(
   base::FilePath test_data_dir = GetTestDataDir();
   base::DictionaryValue* value = manifest.GetManifest(test_data_dir, error);
   if (!value)
-    return NULL;
+    return nullptr;
   return Extension::Create(
       test_data_dir.DirName(), location, *value, flags, error);
 }