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

extensions/browser/content_verifier.cc

Index: extensions/browser/content_verifier.cc
diff --git a/extensions/browser/content_verifier.cc b/extensions/browser/content_verifier.cc
index 52321c9267ac9e6cdc3e366a47584026e7b58d66..dba0b09bfe56ca16f505ba631e4903ca5ac17985 100644
--- a/extensions/browser/content_verifier.cc
+++ b/extensions/browser/content_verifier.cc
@@ -59,12 +59,12 @@ ContentVerifyJob* ContentVerifier::CreateJobFor(
   const ContentVerifierIOData::ExtensionData* data =
       io_data_->GetData(extension_id);
   if (!data)
-    return NULL;
+    return nullptr;
 
   std::set<base::FilePath> paths;
   paths.insert(relative_path);
   if (!ShouldVerifyAnyPaths(extension_id, extension_root, paths))
-    return NULL;
+    return nullptr;
 
   // TODO(asargent) - we can probably get some good performance wins by having
   // a cache of ContentHashReader's that we hold onto past the end of each job.