[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 7c9a844914f480ab7af0c7bab822fedf82dbb7e1..b2c11bff1c226bd8496b534b150381eb11d28187 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
@@ -35,4 +35,14 @@ public interface SelectionClient {
      * to wait for this responce before taking further actions.
      */
     boolean sendsSelectionPopupUpdates();
+
+    /**
+     * 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);
 }