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

components/history/core/browser/top_sites_impl_unittest.cc

Index: components/history/core/browser/top_sites_impl_unittest.cc
diff --git a/components/history/core/browser/top_sites_impl_unittest.cc b/components/history/core/browser/top_sites_impl_unittest.cc
index aaacb7352aff40680f0d114189fd55c550d80338..0acd9fe9e360d77357e8a48267678a2197f94782 100644
--- a/components/history/core/browser/top_sites_impl_unittest.cc
+++ b/components/history/core/browser/top_sites_impl_unittest.cc
@@ -52,14 +52,14 @@ bool MockCanAddURLToHistory(const GURL& url) {
 }
 
 // Used for querying top sites. Either runs sequentially, or runs a nested
-// nested message loop until the response is complete. The later is used when
+// nested run loop until the response is complete. The later is used when
 // TopSites is queried before it finishes loading.
 class TopSitesQuerier {
  public:
   TopSitesQuerier()
       : number_of_callbacks_(0), waiting_(false), weak_ptr_factory_(this) {}
 
-  // Queries top sites. If |wait| is true a nested message loop is run until the
+  // Queries top sites. If |wait| is true a nested run loop is run until the
   // callback is notified.
   void QueryTopSites(TopSitesImpl* top_sites, bool wait) {
     QueryAllTopSites(top_sites, wait, false);