Add UMA metrics and histograms for locally managed users.

chrome/browser/history/url_database.cc

Index: chrome/browser/history/url_database.cc
===================================================================
--- chrome/browser/history/url_database.cc	(revision 177135)
+++ chrome/browser/history/url_database.cc	(working copy)
@@ -111,6 +111,31 @@
   return true;
 }
 
+bool URLDatabase::GetUniqueURLsInRange(base::Time begin_time,
+                                       base::Time end_time,
+                                       int max_results,
+                                       URLRows* urls) {
+  sql::Statement statement(GetDB().GetCachedStatement(SQL_FROM_HERE,
+      "SELECT DISTINCT" HISTORY_URL_ROW_FIELDS "FROM urls "
+      "WHERE last_visit_time > ? AND last_visit_time < ? "
+      "ORDER BY last_visit_time LIMIT ?"));
+
+  // See VisitDatabase::GetVisibleVisitsInRange for more info on how these
+  // times are bound.
+  int64 end = end_time.ToInternalValue();
+  statement.BindInt64(0, begin_time.ToInternalValue());
+  statement.BindInt64(1, end ? end : std::numeric_limits<int64>::max());
+  statement.BindInt64(2,
+      max_results ? max_results : std::numeric_limits<int64>::max());
+
+  while (statement.Step()) {
+    URLRow info;
+    FillURLRow(statement, &info);
+    urls->push_back(info);
+  }
+  return true;
+}
+
 URLID URLDatabase::GetRowForURL(const GURL& url, history::URLRow* info) {
   sql::Statement statement(GetDB().GetCachedStatement(SQL_FROM_HERE,
       "SELECT" HISTORY_URL_ROW_FIELDS "FROM urls WHERE url=?"));