[Tab Metrics] Measure FP, FCP and FMP for Foreground Tab during Session Restore

chrome/browser/resource_coordinator/tab_manager.h

Index: chrome/browser/resource_coordinator/tab_manager.h
diff --git a/chrome/browser/resource_coordinator/tab_manager.h b/chrome/browser/resource_coordinator/tab_manager.h
index afd6a05e052eccfa386c76d64048bee2df2ebbfb..0d460e132cfd5e261fca42e73a908ffc4af2b05f 100644
--- a/chrome/browser/resource_coordinator/tab_manager.h
+++ b/chrome/browser/resource_coordinator/tab_manager.h
@@ -160,6 +160,10 @@ class TabManager : public TabStripModelObserver {
 
   bool IsInSessionRestore() const { return in_session_restore_; }
 
+  bool HasInitialActiveTabChanged() const {
+    return initial_active_tab_changed_;
+  }
+
  private:
   FRIEND_TEST_ALL_PREFIXES(TabManagerTest, PurgeBackgroundRenderer);
   FRIEND_TEST_ALL_PREFIXES(TabManagerTest, ActivateTabResetPurgeState);
@@ -374,6 +378,8 @@ class TabManager : public TabStripModelObserver {
 
   bool in_session_restore_;
 
+  bool initial_active_tab_changed_;
+
   // Weak pointer factory used for posting delayed tasks.
   base::WeakPtrFactory<TabManager> weak_ptr_factory_;