[TTS] Add an ACK message to SelectWordAroundCaret.

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

Index: content/public/android/java/src/org/chromium/content/browser/ContextualSearchClient.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContextualSearchClient.java b/content/public/android/java/src/org/chromium/content/browser/ContextualSearchClient.java
index 96e135c6bd65d4ce23be431b71b645cfd838261f..b0bccd93de67b6a32841888df2778874b904adcb 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContextualSearchClient.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContextualSearchClient.java
@@ -28,4 +28,14 @@ public interface ContextualSearchClient {
      * @param y The y coordinate of the tap.
      */
     void showUnhandledTapUIIfNeeded(int x, int y);
+
+    /**
+     * 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);
 }