[Session restore] Add MRU logic to loading of background pages.

chrome/browser/sessions/session_restore_delegate.h

Index: chrome/browser/sessions/session_restore_delegate.h
diff --git a/chrome/browser/sessions/session_restore_delegate.h b/chrome/browser/sessions/session_restore_delegate.h
index 63e40eee210d704ca7d36d75915e4dabbf15cf72..0484c527a2e868fd9544f3118821a74fc616409e 100644
--- a/chrome/browser/sessions/session_restore_delegate.h
+++ b/chrome/browser/sessions/session_restore_delegate.h
@@ -22,7 +22,8 @@ class SessionRestoreDelegate {
     RestoredTab(content::WebContents* contents,
                 bool is_active,
                 bool is_app,
-                bool is_pinned);
+                bool is_pinned,
+                base::TimeTicks last_activation_time);

[sky, 2015/05/12 21:25:30]

If you push this to the WebContents, do you need it here too?

[Georges Khalil, 2015/05/15 16:55:30]

Good catch.

Pushing to WebContents was added at the very end when we realized that
successive restores would not work, so this was needed before that.

 
     bool operator<(const RestoredTab& right) const;
 
@@ -31,6 +32,9 @@ class SessionRestoreDelegate {
     bool is_app() const { return is_app_; }
     bool is_internal_page() const { return is_internal_page_; }
     bool is_pinned() const { return is_pinned_; }
+    base::TimeTicks last_activation_time() const {
+      return last_activation_time_;
+    }
 
    private:
     content::WebContents* contents_;
@@ -38,6 +42,7 @@ class SessionRestoreDelegate {
     bool is_app_;            // Browser window is an app.
     bool is_internal_page_;  // Internal web UI page, like NTP or Settings.
     bool is_pinned_;
+    base::TimeTicks last_activation_time_;
   };
 
   static void RestoreTabs(const std::vector<RestoredTab>& tabs,