Replace "nested message loop" with "nested run loop" in comments.

chrome/browser/autocomplete/search_provider_unittest.cc

Index: chrome/browser/autocomplete/search_provider_unittest.cc
diff --git a/chrome/browser/autocomplete/search_provider_unittest.cc b/chrome/browser/autocomplete/search_provider_unittest.cc
index 8a20136ee8a17bb47c8e39904d86411a788f5efe..3f9f6f5b88fe9cd20ac2e4eeca4213a44be2208d 100644
--- a/chrome/browser/autocomplete/search_provider_unittest.cc
+++ b/chrome/browser/autocomplete/search_provider_unittest.cc
@@ -192,7 +192,7 @@ class SearchProviderTest : public testing::Test,
   // If we're waiting for the provider to finish, this exits the message loop.
   void OnProviderUpdate(bool updated_matches) override;
 
-  // Runs a nested message loop until provider_ is done. The message loop is
+  // Runs a nested run loop until provider_ is done. The message loop is
   // exited by way of OnProviderUpdate.
   void RunTillProviderDone();