[Session restore] Expose lazy mode and fix browser tests.

chrome/browser/sessions/session_restore.h

Index: chrome/browser/sessions/session_restore.h
diff --git a/chrome/browser/sessions/session_restore.h b/chrome/browser/sessions/session_restore.h
index e6cb7819e514e7319d77cb150a8902ad28df3234..6eaccbdbfbdedb74c7d120a75db6cf312457e2d5 100644
--- a/chrome/browser/sessions/session_restore.h
+++ b/chrome/browser/sessions/session_restore.h
@@ -98,6 +98,11 @@ class SessionRestore {
   static CallbackSubscription RegisterOnSessionRestoredCallback(
       const base::Callback<void(int)>& callback);
 
+  // Returns true if only active tabs are to be loaded during session restore
+  // (lazy load). Otherwise returns false if all tabs will be loaded when
+  // restored.
+  static bool IsLoadingActiveTabsOnly();

[sky, 2015/04/16 15:40:10]

This seems more like a will, eg WillLoadActiveTabsOnly.

[Georges Khalil, 2015/04/16 18:10:18]

Done.

+
  private:
   SessionRestore();