Revert of Disable search functionality in ChromeActivity before search promo check

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java
index 44daa5459a19017f67e4d03bdeec92296b25745e..cb4421cba98001f62f549dbca43d501837354175 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java
@@ -58,7 +58,6 @@
 import org.chromium.chrome.browser.externalnav.ExternalNavigationHandler;
 import org.chromium.chrome.browser.firstrun.FirstRunStatus;
 import org.chromium.chrome.browser.gsa.GSAContextDisplaySelection;
-import org.chromium.chrome.browser.locale.LocaleManager;
 import org.chromium.chrome.browser.omnibox.UrlBar;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.EmptyTabModelSelectorObserver;
@@ -146,13 +145,6 @@
                 FirstRunStatus.setFirstRunFlowComplete(true);
             }
         });
-        LocaleManager.setInstanceForTest(new LocaleManager() {
-            @Override
-            public boolean needToCheckForSearchEnginePromo() {
-                return false;
-            }
-        });
-
         mActivityTestRule.startMainActivityWithURL(mTestServer.getURL(TEST_PAGE));
         // There's a problem with immediate startup that causes flakes due to the page not being
         // ready, so specify a startup-delay of 1000 for legacy behavior.  See crbug.com/635661.