Disable learning text suggestions if in incognito.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/omnibox/UrlBar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/omnibox/UrlBar.java b/chrome/android/java/src/org/chromium/chrome/browser/omnibox/UrlBar.java
index f0c4e28f50f1ebc13f130246176aec3253084c3e..815276216ebe433877f0434b5b1faab0543eb56b 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/omnibox/UrlBar.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/omnibox/UrlBar.java
@@ -27,6 +27,8 @@ import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.accessibility.AccessibilityNodeInfo;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputConnection;
 import android.widget.TextView;
 
 import org.chromium.base.ApiCompatibilityUtils;
@@ -55,6 +57,11 @@ public class UrlBar extends AutocompleteEditText {
 
     private static final boolean DEBUG = false;
 
+    // TODO(tedchoc): Replace with EditorInfoCompat#IME_FLAG_NO_PERSONALIZED_LEARNING or
+    //                EditorInfo#IME_FLAG_NO_PERSONALIZED_LEARNING as soon as either is available in
+    //                all build config types.
+    private static final int IME_FLAG_NO_PERSONALIZED_LEARNING = 0x1000000;
+
     // TextView becomes very slow on long strings, so we limit maximum length
     // of what is displayed to the user, see limitDisplayableLength().
     private static final int MAX_DISPLAYABLE_LENGTH = 4000;
@@ -141,6 +148,11 @@ public class UrlBar extends AutocompleteEditText {
         Tab getCurrentTab();
 
         /**
+         * @return Whether the keyboard should be allowed to learn from the user input.
+         */
+        boolean allowKeyboardLearning();
+
+        /**
          * Called when the text state has changed and the autocomplete suggestions should be
          * refreshed.
          *
@@ -640,6 +652,15 @@ public class UrlBar extends AutocompleteEditText {
     }
 
     @Override
+    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
+        InputConnection connection = super.onCreateInputConnection(outAttrs);
+        if (mUrlBarDelegate == null || !mUrlBarDelegate.allowKeyboardLearning()) {
+            outAttrs.imeOptions |= IME_FLAG_NO_PERSONALIZED_LEARNING;
+        }
+        return connection;
+    }
+
+    @Override
     protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
         super.onTextChanged(text, start, lengthBefore, lengthAfter);
         mIsPastedText = false;