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 1f0cf7b793032ce4608c0791dac2461a908c834a..59fa96425f818203e970466b727d7406bcbdeae1 100644
--- a/chrome/browser/bookmarks/bookmark_model.h
+++ b/chrome/browser/bookmarks/bookmark_model.h
@@ -10,6 +10,7 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/deferred_sequenced_task_runner.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ -234,6 +235,10 @@ class BookmarkModel : public content::NotificationObserver,
   // Invoked prior to destruction to release any necessary resources.
   virtual void Shutdown() OVERRIDE;
 
+  // Returns sequenced task runner where all bookmarks I/O operations are
+  // performed.
+  scoped_refptr<base::DeferredSequencedTaskRunner> GetBookmarkTaskRunner();
+
   // Loads the bookmarks. This is called upon creation of the
   // BookmarkModel. You need not invoke this directly.
   void Load();
@@ -528,6 +533,8 @@ class BookmarkModel : public content::NotificationObserver,
 
   scoped_ptr<BookmarkExpandedStateTracker> expanded_state_tracker_;
 
+  scoped_refptr<base::DeferredSequencedTaskRunner> bookmark_task_runner_;
+
   DISALLOW_COPY_AND_ASSIGN(BookmarkModel);
 };