Don't show the Data Saver promo in incognito mode

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 63010bdf006871acd8bb84dc00c037e0ce978500..5645b5d80b975d058be73c0327ef26f0f6527a51 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
@@ -487,8 +487,10 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
                     && preferenceManager.getPromosSkippedOnFirstStart()) {
                 // Data reduction promo should be temporarily suppressed if the sign in promo is
                 // shown to avoid nagging users too much.
+                TabModel currentModel = mTabModelSelectorImpl.getCurrentModel();
                 if (!SigninPromoUtil.launchSigninPromoIfNeeded(this)) {
-                    if (!DataReductionPromoScreen.launchDataReductionPromo(this)
+                    if (!DataReductionPromoScreen.launchDataReductionPromo(
+                                this, currentModel.isIncognito())
                             && getBottomSheet() != null) {
                         getBottomSheet().showHelpBubbleIfNecessary();
                     }