First cut at Safari Import - Home Page & History Only.

chrome/browser/history/history_types.h

Index: chrome/browser/history/history_types.h
diff --git a/chrome/browser/history/history_types.h b/chrome/browser/history/history_types.h
index 38561b5298b59c0ca0f4ba6d3a1f733ff64d5d47..f23af42731984012edb4f305811c77fdb6148b0b 100644
--- a/chrome/browser/history/history_types.h
+++ b/chrome/browser/history/history_types.h
@@ -95,6 +95,7 @@ class URLRow {
     visit_count_ = visit_count;
   }
 
+  // Number of times the URL was typed in the Omnibox.
   int typed_count() const {
     return typed_count_;
   }
@@ -109,6 +110,7 @@ class URLRow {
     last_visit_ = last_visit;
   }
 
+  // If this is set, we won't autocomplete this URL.
   bool hidden() const {
     return hidden_;
   }