🏡 Disable BottomSheet touches while context menu is open.

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 45ffb7fa91b240010d40e84748bd6d04fc740019..229fcb8b16e7abb51a4cb6e630aa710508dc8bfa 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
@@ -183,6 +183,9 @@ public class BottomSheet
      */
     private View mDefaultToolbarView;
 
+    /** Whether the {@link BottomSheet} and its children should react to touch events. */
+    private boolean mIsTouchEnabled = true;
+
     /** Whether the sheet is currently open. */
     private boolean mIsSheetOpen;
 
@@ -334,8 +337,19 @@ public class BottomSheet
         addObserver(mMetrics);
     }
 
+    /**
+     * Sets whether the {@link BottomSheet} and its children should react to touch events.
+     */
+    public void setTouchEnabled(boolean enabled) {
+        mIsTouchEnabled = enabled;
+    }
+
     @Override
     public boolean onInterceptTouchEvent(MotionEvent e) {
+        // If touch is disabled, act like a black hole and consume touch events without doing
+        // anything with them.
+        if (!mIsTouchEnabled) return true;
+
         if (!canMoveSheet()) return false;
 
         // The incoming motion event may have been adjusted by the view sending it down. Create a
@@ -347,6 +361,10 @@ public class BottomSheet
 
     @Override
     public boolean onTouchEvent(MotionEvent e) {
+        // If touch is disabled, act like a black hole and consume touch events without doing
+        // anything with them.
+        if (!mIsTouchEnabled) return true;
+
         if (isToolbarAndroidViewHidden()) return false;
 
         // The down event is interpreted above in onInterceptTouchEvent, it does not need to be
@@ -998,6 +1016,10 @@ public class BottomSheet
     @Override
     public void onFadingViewVisibilityChanged(boolean visible) {}
 
+    /**
+     * Checks whether the sheet can be moved. It cannot be moved when the activity is in overview
+     * mode, when "find in page" is visible, or when the toolbar is hidden.
+     */
     private boolean canMoveSheet() {
         boolean isInOverviewMode = mTabModelSelector != null
                 && (mTabModelSelector.getCurrentTab() == null