Stop history search going on beyond the start of history....

chrome/browser/history/history_types.cc

Index: chrome/browser/history/history_types.cc
===================================================================
--- chrome/browser/history/history_types.cc	(revision 11260)
+++ chrome/browser/history/history_types.cc	(working copy)
@@ -92,7 +92,7 @@
 
 // QueryResults ----------------------------------------------------------------
 
-QueryResults::QueryResults() {
+QueryResults::QueryResults() : reached_beginning_(false) {
 }
 
 QueryResults::~QueryResults() {
@@ -119,6 +119,7 @@
 
 void QueryResults::Swap(QueryResults* other) {
   std::swap(first_time_searched_, other->first_time_searched_);
+  std::swap(reached_beginning_, other->reached_beginning_);
   results_.swap(other->results_);
   url_to_results_.swap(other->url_to_results_);
 }
@@ -142,6 +143,9 @@
   if (first_time_searched_ > other->first_time_searched_)
     std::swap(first_time_searched_, other->first_time_searched_);
 
+  if (reached_beginning_ != other->reached_beginning_)
+    std::swap(reached_beginning_, other->reached_beginning_);
+
   for (size_t i = 0; i < other->results_.size(); i++) {
     // Just transfer pointer ownership.
     results_.push_back(other->results_[i]);