[TTS] Add an ACK message to SelectWordAroundCaret.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java
index 65197c45eced18d5ebe6de0e717b2b1ef54deae7..d2322260eae3d2c61aca6be1b9e314036db76655 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java
@@ -1245,6 +1245,13 @@ public class ContextualSearchManager implements ContextualSearchManagementDelega
         }
     }
 
+    @Override
+    public void selectWordAroundCaretAck(boolean didSelect, int startAdjust, int endAdjust) {
+        if (!isOverlayVideoMode()) {
+            mSelectionController.selectWordAroundCaretAck(didSelect, startAdjust, endAdjust);
+        }
+    }
+
     private boolean isOverlayVideoMode() {
         return mActivity.getFullscreenManager() != null
                 && mActivity.getFullscreenManager().isOverlayVideoMode();