On tab clobber, set referrer.

chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
index 4701a6b175ccf433e3dcb8a43514f6115a880012..22bf165547875ca4e6b51207b217dbb0350485d7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
@@ -114,6 +114,7 @@ import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.crypto.CipherFactory;
 import org.chromium.content.common.ContentSwitches;
 import org.chromium.content_public.browser.LoadUrlParams;
+import org.chromium.content_public.common.Referrer;
 import org.chromium.ui.base.DeviceFormFactor;
 import org.chromium.ui.base.PageTransition;
 import org.chromium.ui.base.WindowAndroid;
@@ -821,6 +822,10 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
                         loadUrlParams.setHasUserGesture(hasUserGesture);
                         loadUrlParams.setTransitionType(IntentHandler.getTransitionTypeFromIntent(
                                 getApplicationContext(), intent, transitionType));
+                        if (referer != null) {
+                            loadUrlParams.setReferrer(
+                                    new Referrer(referer, Referrer.REFERRER_POLICY_DEFAULT));
+                        }
                         currentTab.loadUrl(loadUrlParams);
                         RecordUserAction.record("MobileTabClobbered");
                     } else {