Fix NullPointerException in SuggestionsBottomSheetContent

chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsBottomSheetContent.java

Index: chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsBottomSheetContent.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsBottomSheetContent.java b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsBottomSheetContent.java
index 4ba7c542665b460ca227f9be17653561fce0a683..fec31e58678fb73f7d7f3c886b1b4f132cbca716 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsBottomSheetContent.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsBottomSheetContent.java
@@ -100,7 +100,8 @@ public class SuggestionsBottomSheetContent implements BottomSheet.BottomSheetCon
                 mRecyclerView.getScrollEventReporter().reset();
 
                 if (ChromeFeatureList.isEnabled(
-                            ChromeFeatureList.CONTEXTUAL_SUGGESTIONS_CAROUSEL)) {
+                            ChromeFeatureList.CONTEXTUAL_SUGGESTIONS_CAROUSEL)
+                        && sheet.getActiveTab() != null) {
                     updateContextualSuggestions(sheet.getActiveTab().getUrl());
                 }