Fix the TabScrubber always starting from the first tab in full screen mode.

chrome/browser/ui/views/frame/immersive_mode_controller.h

Index: chrome/browser/ui/views/frame/immersive_mode_controller.h
diff --git a/chrome/browser/ui/views/frame/immersive_mode_controller.h b/chrome/browser/ui/views/frame/immersive_mode_controller.h
index 510b011f132fe36c215cb11bfbd9032e653b1b1a..99fafc66abd17a55db89c00738d9357a64c2ff5a 100644
--- a/chrome/browser/ui/views/frame/immersive_mode_controller.h
+++ b/chrome/browser/ui/views/frame/immersive_mode_controller.h
@@ -50,6 +50,9 @@ class ImmersiveModeController {
     // Called when a reveal of the top-of-window views has been initiated.
     virtual void OnImmersiveRevealStarted() {}
 
+    // Called when a reveal of the top-of-window views has finished.
+    virtual void OnImmersiveRevealEnded() {}
+
     // Called when the immersive mode controller has been destroyed.
     virtual void OnImmersiveModeControllerDestroyed() {}