[Touchless]: Adjust initial scroll position of ESP on touchless devices.

Bug: 977248
Change-Id: Ic1190f11013894dc51ae92588f48ee550880610b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1670111Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Commit-Queue: Cathy Li <chili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#671422}

chrome/android/java/src/org/chromium/chrome/browser/explore_sites/ExploreSitesPage.java

@@ -29,6 +29,7 @@ import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.tab.EmptyTabObserver;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tab.TabObserver;
+import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.UrlConstants;
 import org.chromium.chrome.browser.widget.RoundedIconGenerator;
 import org.chromium.content_public.browser.NavigationController;
@@ -180,10 +181,11 @@ public class ExploreSitesPage extends BasicNativePage {
         });
 
         // We don't want to scroll to the 4th category if personalized
-        // or integrated with Most Likely.
+        // or integrated with Most Likely, or if we're on a touchless device.
         int variation = ExploreSitesBridge.getVariation();
         mInitialScrollPosition = variation == ExploreSitesVariation.PERSONALIZED
                         || ExploreSitesBridge.isIntegratedWithMostLikely(variation)
+                        || FeatureUtilities.isNoTouchModeEnabled()
                 ? INITIAL_SCROLL_POSITION_PERSONALIZED
                 : INITIAL_SCROLL_POSITION;