[Home] Add more descriptive user actions for opening/closing the bottom sheet

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 48602af38b47d2ece5e6084edd9c66138dda557a..d8455e404d640ab50899f55da78dffeb0b9d4262 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
@@ -342,6 +342,9 @@ public class BottomSheet
             @SheetState
             int targetState = getTargetSheetState(
                     getSheetOffsetFromBottom() + getFlingDistance(-velocityY), -velocityY);
+            if (targetState == SHEET_STATE_PEEK) {
+                mMetrics.setSheetCloseReason(BottomSheetMetrics.CLOSED_BY_SWIPE);
+            }
             setSheetState(targetState, true);
             mIsScrolling = false;
 
@@ -437,6 +440,9 @@ public class BottomSheet
                 @SheetState
                 int targetState = getTargetSheetState(getSheetOffsetFromBottom(), currentVelocity);
 
+                if (targetState == SHEET_STATE_PEEK) {
+                    mMetrics.setSheetCloseReason(BottomSheetMetrics.CLOSED_BY_SWIPE);
+                }
                 setSheetState(targetState, true);
             }
         }
@@ -605,6 +611,7 @@ public class BottomSheet
         }
 
         // In all non-native cases, minimize the sheet.
+        mMetrics.setSheetCloseReason(BottomSheetMetrics.CLOSED_BY_NAVIGATION);
         setSheetState(SHEET_STATE_PEEK, true);
 
         assert mTabModelSelector != null;
@@ -1140,6 +1147,7 @@ public class BottomSheet
 
     @Override
     public void onFadingViewClick() {
+        mMetrics.setSheetCloseReason(BottomSheetMetrics.CLOSED_BY_TAP_SCRIM);
         setSheetState(SHEET_STATE_PEEK, true);
     }