[TTS] Add an ACK message to SelectWordAroundCaret.

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

Index: content/public/android/java/src/org/chromium/content/browser/SelectionClient.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/SelectionClient.java b/content/public/android/java/src/org/chromium/content/browser/SelectionClient.java
index bc6b74218af32feff1448673a35caf729fb9c3b0..f9a7955bc06ed9b82dd349b682448cbba4cf8ece 100644
--- a/content/public/android/java/src/org/chromium/content/browser/SelectionClient.java
+++ b/content/public/android/java/src/org/chromium/content/browser/SelectionClient.java
@@ -41,4 +41,14 @@ public interface SelectionClient {
      * SelectionClient.requestSelectionPopupUpdates().
      */
     public void cancelAllRequests();
+
+    /**
+     * Acknowledges that a selectWordAroundCaret action has completed with the given result.
+     * @param didSelect Whether a word was actually selected or not.
+     * @param startAdjust The adjustment to the selection start offset needed to select the word.
+     *        This is typically a negative number (expressed in terms of number of characters).
+     * @param endAdjust The adjustment to the selection end offset needed to select the word.
+     *        This is typically a positive number (expressed in terms of number of characters).
+     */
+    void selectWordAroundCaretAck(boolean didSelect, int startAdjust, int endAdjust);
 }