[TTS] Handle showing of a Context Menu more gracefully.

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 291 matching lines @@
     }
 
     /**
      * Notifies that the base page has started loading a page.
      */
     public void onBasePageLoadStarted() {
         mSelectionController.onBasePageLoadStarted();
     }
 
     /**
+     * Notifies that a Context Menu has been shown.
+     */
+    void onContextMenuShown() {
+        mSelectionController.onContextMenuShown();
+    }
+
+    /**
      * Hides the Contextual Search UX.
      * @param reason The {@link StateChangeReason} for hiding Contextual Search.
      */
     public void hideContextualSearch(StateChangeReason reason) {
         if (mSearchPanel == null) return;
 
         if (mSearchPanel.isShowing()) {
             mSearchPanel.closePanel(reason, false);
         } else {
             if (mSelectionController.getSelectionType() == SelectionType.TAP) {
@@ skipping 1038 matching lines @@
             boolean maySendBasePageUrl);
     protected native void nativeGatherSurroundingText(long nativeContextualSearchManager,
             String selection, boolean useResolvedSearchTerm, ContentViewCore baseContentViewCore,
             boolean maySendBasePageUrl);
     private native void nativeEnableContextualSearchJsApiForOverlay(
             long nativeContextualSearchManager, ContentViewCore overlayContentViewCore);
     // 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);
 }