Stop UI jumping when clicking Contextual Search Results in Custom Tab

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
index efeef0faa2af439ad728ccd13b87159087bf80c6..74ac2b0f78ee0c6068d3ad93073a2702525787ee 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
@@ -13,6 +13,7 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.ViewGroup;
+import android.view.Window;
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.Log;
@@ -119,6 +120,7 @@ public class CustomTabActivity extends ChromeActivity {
             }
         });
         mIntentDataProvider = new CustomTabIntentDataProvider(getIntent(), this);
+        supportRequestWindowFeature(Window.FEATURE_ACTION_MODE_OVERLAY);
     }
 
     @Override
@@ -236,6 +238,7 @@ public class CustomTabActivity extends ChromeActivity {
     @Override
     public boolean createContextualSearchTab(ContentViewCore searchContentViewCore) {
         if (mTab == null) return false;
+        getCurrentContentViewCore().clearSelection();
         NavigationEntry entry =
                 searchContentViewCore.getWebContents().getNavigationController().getPendingEntry();
         String url = entry != null