[SmartText selection] Implement TextClassifier getter and setter

content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java

Index: content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java b/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
index 3db2c5000bf2e9165d23c921ea1466670276b2ba..25bf79f4ef21b09d816c14b95109d26bd39ee8cb 100644
--- a/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
+++ b/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
@@ -1109,6 +1109,32 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
                 PackageManager.MATCH_DEFAULT_ONLY).size() > 0;
     }
 
+    // TODO(timav): Use |TextClassifier| instead of |Object| after we switch to Android SDK 26.
+    /**
+     * Sets TextClassifier for Smart Text selection.
+     */
+    public void setTextClassifier(Object textClassifier) {
+        if (mSelectionClient != null) mSelectionClient.setTextClassifier(textClassifier);
+    }
+
+    // TODO(timav): Use |TextClassifier| instead of |Object| after we switch to Android SDK 26.
+    /**
+     * Returns TextClassifier that is used for Smart Text selection. If the custom classifier
+     * has been set with setTextClassifier, returns that object, otherwise returns the system
+     * classifier.
+     */
+    public Object getTextClassifier() {
+        return mSelectionClient == null ? null : mSelectionClient.getTextClassifier();
+    }
+
+    // TODO(timav): Use |TextClassifier| instead of |Object| after we switch to Android SDK 26.
+    /**
+     * Returns the TextClassifier which has been set with setTextClassifier(), or null.
+     */
+    public Object getCustomTextClassifier() {
+        return mSelectionClient == null ? null : mSelectionClient.getCustomTextClassifier();
+    }
+
     // The callback class that delivers result from a SmartSelectionClient.
     private class SmartSelectionCallback implements SmartSelectionProvider.ResultCallback {
         @Override