[HomepageConversion] Default enable expriment flag

Set HomepageConversion expriment flag to default enabled for the
waterfall rollout.

Bug: 1036470, 1054616
Change-Id: I0cf98d4be83ebc5e233a89cdbeb88ad6b9246288
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2096094Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Wenyu Fu <wenyufu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748827}

chrome/android/javatests/src/org/chromium/chrome/browser/homepage/HomepagePolicyIntegrationTest.java

@@ -41,6 +41,7 @@ import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 import org.chromium.chrome.test.ChromeTabbedActivityTestRule;
 import org.chromium.chrome.test.util.ChromeTabUtils;
 import org.chromium.chrome.test.util.browser.Features;
+import org.chromium.chrome.test.util.browser.Features.DisableFeatures;
 import org.chromium.chrome.test.util.browser.TabLoadObserver;
 import org.chromium.content_public.browser.test.util.Criteria;
 import org.chromium.content_public.browser.test.util.CriteriaHelper;
@@ -177,6 +178,7 @@ public class HomepagePolicyIntegrationTest {
     @Test
     @MediumTest
     @Feature({"Homepage"})
+    @DisableFeatures(ChromeFeatureList.HOMEPAGE_SETTINGS_UI_CONVERSION)
     public void testHomepagePreference() {
         // Launch homepage preference page
         SettingsActivity homepagePreferenceActivity =

chrome/browser/flags/android/chrome_feature_list.cc

@@ -447,7 +447,7 @@ const base::Feature kHomepageLocation{"HomepageLocationPolicy",
                                       base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kHomepageSettingsUIConversion{
-    "HomepageSettingsUIConversion", base::FEATURE_DISABLED_BY_DEFAULT};
+    "HomepageSettingsUIConversion", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kHorizontalTabSwitcherAndroid{
     "HorizontalTabSwitcherAndroid", base::FEATURE_DISABLED_BY_DEFAULT};