[Home] Record some user actions for the Chrome Home BottomSheet

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

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetObserver.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetObserver.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetObserver.java
index bc285192e4ff375ec6bad1ea2faa3360d87ad15f..158fb1a301875a24f369833414e27b5535b4e95f 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetObserver.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetObserver.java
@@ -4,6 +4,9 @@
 
 package org.chromium.chrome.browser.widget.bottomsheet;
 
+import org.chromium.chrome.browser.widget.bottomsheet.BottomSheet.BottomSheetContent;
+import org.chromium.chrome.browser.widget.bottomsheet.BottomSheet.SheetState;
+
 /**
  * An interface for notifications about the state of the bottom sheet.
  */
@@ -47,4 +50,16 @@ public interface BottomSheetObserver {
      *                           when the sheet is half expanded.
      */
     void onTransitionPeekToHalf(float transitionFraction);
+
+    /**
+     * An event for when the sheet changes state.
+     * @param newState The new sheet state. See {@link SheetState}.
+     */
+    void onSheetStateChanged(@SheetState int newState);
+
+    /**
+     * An event for when the sheet content changes.
+     * @param newContent The new {@link BottomSheetContent}.
+     */
+    void onSheetContentChanged(BottomSheetContent newContent);
 }