Disable learning text suggestions if in incognito.

chrome/android/java/src/org/chromium/chrome/browser/toolbar/CustomTabToolbar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/toolbar/CustomTabToolbar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/toolbar/CustomTabToolbar.java b/chrome/android/java/src/org/chromium/chrome/browser/toolbar/CustomTabToolbar.java
index 027cfd201ffe8a8b67c88397aecc5734231636ea..192de94cf739e488dedd44cd059cbb8eaabf251e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/toolbar/CustomTabToolbar.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/toolbar/CustomTabToolbar.java
@@ -245,6 +245,11 @@ public class CustomTabToolbar extends ToolbarLayout implements LocationBar,
     }
 
     @Override
+    public boolean isIncognito() {
+        return super.isIncognito();

[Changwan Ryu, 2017/05/23 18:54:23]

Hmm.. We probably don't need this?

[Ted C, 2017/05/23 19:17:55]

The super version is protected and the interface requires public, so this is
required to increase the visibility.

+    }
+
+    @Override
     public boolean shouldEmphasizeHttpsScheme() {
         int securityLevel = getSecurityLevel();
         return securityLevel == ConnectionSecurityLevel.DANGEROUS