Add isInOverviewAndShowingOmnibox check in LocationBarDataProvider#isLoading.

Bug: 1148813
Change-Id: Ia4ec5c44f8e00d2af18f5a161f3bfe1c84a1d9f8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2537115
Commit-Queue: Hao Dong <spdonghao@chromium.org>
Reviewed-by: Xi Han <hanxi@chromium.org>
Reviewed-by: Patrick Noland <pnoland@chromium.org>
Reviewed-by: Filip Gorski <fgorski@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827878}

chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarDataProvider.java

@@ -52,6 +52,7 @@ public interface LocationBarDataProvider {
 
     /** Returns whether the currently active page is loading. */
     default boolean isLoading() {
+        if (isInOverviewAndShowingOmnibox()) return false;
         Tab tab = getTab();
         return tab != null && tab.isLoading();
     }