Delay bookmarks load while the profile is loading.

chrome/browser/bookmarks/bookmark_model.h

Index: chrome/browser/bookmarks/bookmark_model.h
diff --git a/chrome/browser/bookmarks/bookmark_model.h b/chrome/browser/bookmarks/bookmark_model.h
index 1d846d754a0a0144ae33bcf0d23c96f0ef3b5113..9853d3863a1de01e336ab326b97421846979359c 100644
--- a/chrome/browser/bookmarks/bookmark_model.h
+++ b/chrome/browser/bookmarks/bookmark_model.h
@@ -33,6 +33,10 @@ class BookmarkModelObserver;
 class BookmarkStorage;
 class Profile;
 
+namespace base {
+class SequencedTaskRunner;
+}
+
 namespace bookmark_utils {
 struct TitleMatch;
 }
@@ -236,7 +240,8 @@ class BookmarkModel : public content::NotificationObserver,
 
   // Loads the bookmarks. This is called upon creation of the
   // BookmarkModel. You need not invoke this directly.
-  void Load();
+  // All load operations will be executed on |task_runner|.
+  void Load(const scoped_refptr<base::SequencedTaskRunner>& task_runner);
 
   // Returns true if the model finished loading.
   // This is virtual so it can be mocked.