Add omnibox flag to make the test result consistent on official builder.

R=bsheedy@chromium.org, harringtond@chromium.org

Bug: 1028976
Change-Id: I2633728fb7db20bf736f9f23da3558d9030bfe31
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2072132Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Dan H <harringtond@chromium.org>
Commit-Queue: Arthur Wang <wuwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744340}

chrome/android/feed/core/javatests/src/org/chromium/chrome/browser/feed/FeedNewTabPageCardRenderTest.java

@@ -52,7 +52,8 @@ import java.util.List;
 @RunWith(ChromeJUnit4ClassRunner.class)
 @CommandLineFlags
         .Add(ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE)
-        @Features.EnableFeatures(ChromeFeatureList.INTEREST_FEED_CONTENT_SUGGESTIONS)
+        @Features.EnableFeatures({ChromeFeatureList.INTEREST_FEED_CONTENT_SUGGESTIONS,
+                ChromeFeatureList.OMNIBOX_SEARCH_ENGINE_LOGO})
         public class FeedNewTabPageCardRenderTest {
     private static final String TEST_FEED_DATA_BASE_PATH = "/chrome/test/data/android/feed/";