Disable learning text suggestions if in incognito.

chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.java

Index: chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.java
index 12c8848c7ca170597f804ab9d52277fc560f734d..772ee675b04b7a578a0ff2d9b9a14ba3936d1946 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.java
@@ -2249,15 +2249,18 @@ public class LocationBarLayout extends FrameLayout
         updateSecurityIcon(getSecurityLevel());
     }
 
-    /**
-     * @return The Tab currently showing.
-     */
     @Override
     public Tab getCurrentTab() {
         if (mToolbarDataProvider == null) return null;
         return mToolbarDataProvider.getTab();
     }
 
+    @Override
+    public boolean allowKeyboardLearning() {
+        if (mToolbarDataProvider == null) return false;
+        return !mToolbarDataProvider.isIncognito();
+    }
+
     private void initOmniboxResultsContainer() {
         if (mOmniboxResultsContainer != null) return;