[Home] Close the bottom sheet when the tab model is switched

chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java
index 131279d234b4f035336c7ac35dedf9142e0f74af..20570055d162596718e04c90f80f583f3fef73c5 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheet.java
@@ -508,6 +508,13 @@ public class BottomSheet
         }
 
         mNtpController.setTabModelSelector(tabModelSelector);
+
+        mTabModelSelector.addObserver(new EmptyTabModelSelectorObserver() {
+            @Override
+            public void onTabModelSelected(TabModel newModel, TabModel oldModel) {
+                setSheetState(SHEET_STATE_PEEK, true);
+            }
+        });
     }
 
     /**