Misc cleanups in Drive code.

chrome/browser/chromeos/drive/search_metadata.cc

Index: chrome/browser/chromeos/drive/search_metadata.cc
diff --git a/chrome/browser/chromeos/drive/search_metadata.cc b/chrome/browser/chromeos/drive/search_metadata.cc
index bc13d24a3ceb1c86f4e514b594fd8bb2e2d80340..600cbf83af03205efda057ac19a62e6f7d2fe2ae 100644
--- a/chrome/browser/chromeos/drive/search_metadata.cc
+++ b/chrome/browser/chromeos/drive/search_metadata.cc
@@ -113,7 +113,7 @@ class SearchMetadataHelper {
       // Search is complete. Send the result to the callback.
       std::sort(results_->begin(), results_->end(), &CompareByTimestamp);
       if (results_->size() > static_cast<size_t>(at_most_num_matches_)) {
-        // Don't use resize() as it requres a default constructor.
+        // Don't use resize() as it requires a default constructor.
         results_->erase(results_->begin() + at_most_num_matches_,
                         results_->end());
       }