[TTS] Add an ACK message to SelectWordAroundCaret.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.contextualsearch;
 
 import android.text.TextUtils;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
@@ skipping 1227 matching lines @@
     }
 
     @Override
     public void showUnhandledTapUIIfNeeded(final int x, final int y) {
         mDidBasePageLoadJustStart = false;
         if (!isOverlayVideoMode()) {
             mSelectionController.handleShowUnhandledTapUIIfNeeded(x, y);
         }
     }
 
+    @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();
     }
 
     // ============================================================================================
     // Selection
     // ============================================================================================
 
     /**
@@ skipping 187 matching lines @@
             boolean maySendBasePageUrl);
     protected native void nativeGatherSurroundingText(long nativeContextualSearchManager,
             String selection, String homeCountry, WebContents baseWebContents,
             boolean maySendBasePageUrl);
     private native void nativeEnableContextualSearchJsApiForOverlay(
             long nativeContextualSearchManager, WebContents overlayWebContents);
     // Don't call these directly, instead call the private methods that cache the results.
     private native String nativeGetTargetLanguage(long nativeContextualSearchManager);
     private native String nativeGetAcceptLanguages(long nativeContextualSearchManager);
 }