Delay bookmarks load while the profile is loading.

chrome/browser/profiles/profile.h

Index: chrome/browser/profiles/profile.h
diff --git a/chrome/browser/profiles/profile.h b/chrome/browser/profiles/profile.h
index a5ae599bc2d4e3664ff4db182443dc9c055fbfe4..d92f77f3d4946362df9afddee10ec05c703c7bdd 100644
--- a/chrome/browser/profiles/profile.h
+++ b/chrome/browser/profiles/profile.h
@@ -34,6 +34,7 @@ class TabContentsProvider;
 }
 
 namespace base {
+class DeferredSequencedTaskRunner;
 class SequencedTaskRunner;
 class Time;
 }
@@ -164,6 +165,11 @@ class Profile : public content::BrowserContext {
   // operations should be performed.
   virtual scoped_refptr<base::SequencedTaskRunner> GetIOTaskRunner() = 0;
 
+  // Returns sequenced task runner where bookmarks I/O operations should be
+  // performed.
+  virtual scoped_refptr<base::DeferredSequencedTaskRunner>
+      GetBookmarksTaskRunner() = 0;
+
   // Returns the name associated with this profile. This name is displayed in
   // the browser frame.
   virtual std::string GetProfileName() = 0;