Fix typo in LayoutManagerChrome

Change-Id: I8b922761cf9bb18af70e09dfa78b3711fcb067ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2157245
Commit-Queue: Ganggui Tang <gogerald@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Auto-Submit: Ganggui Tang <gogerald@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760554}

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/LayoutManagerChrome.java

@@ -193,7 +193,7 @@ public class LayoutManagerChrome
             mOverviewLayout.destroy();
             mOverviewLayout = null;
         }
-        if (mOverviewLayout != null) {
+        if (mOverviewListLayout != null) {
             mOverviewListLayout.destroy();
         }
         if (mToolbarSwipeLayout != null) {