Add support for highlighting menu items

chrome/android/java/src/org/chromium/chrome/browser/toolbar/TabSwitcherCallout.java

 // Copyright 2016 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.toolbar;
 
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Build;
@@ skipping 16 matching lines @@
     private static final float Y_OVERLAP_DP = 18.f;
 
     /**
      * Show the TabSwitcherCallout, if necessary.
      * @param context           {@link Context} to draw resources from.
      * @param tabSwitcherButton Button that triggers the tab switcher.
      * @return                  {@link TextBubble} if one was shown, {@code null} otherwise.
      */
     @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     public static TextBubble showIfNecessary(Context context, View tabSwitcherButton) {
-        if (!isTabSwitcherCalloutNecessary()) return null;
+        // if (!isTabSwitcherCalloutNecessary()) return null;

[Ted C, 2017/04/12 18:05:57]

?

[David Trainor- moved to gerrit, 2017/04/12 18:59:37]

Doesn't everyone want to see the tab switcher callout!?

         setIsTabSwitcherCalloutNecessary(false);
 
         ViewAnchoredTextBubble bubble = new ViewAnchoredTextBubble(
                 context, tabSwitcherButton, R.string.tab_switcher_callout_body);
         bubble.setDismissOnTouchInteraction(true);
-        bubble.setAutoDismissTimeout(TAB_SWITCHER_CALLOUT_DISMISS_MS);
+        // bubble.setAutoDismissTimeout(TAB_SWITCHER_CALLOUT_DISMISS_MS);
         int yInsetPx = (int) (Y_OVERLAP_DP * context.getResources().getDisplayMetrics().density);
         bubble.setInsetPx(0, yInsetPx, 0, yInsetPx);
         bubble.show();
         return bubble;
     }
 
     /** @return Whether or not the tab switcher button callout needs to be shown. */
     public static boolean isTabSwitcherCalloutNecessary() {
         SharedPreferences prefs = ContextUtils.getAppSharedPreferences();
         return prefs.getBoolean(PREF_NEED_TO_SHOW_TAB_SWITCHER_CALLOUT, false);
     }
 
     /** Sets whether the tab switcher callout should be shown when the browser starts up. */
     public static void setIsTabSwitcherCalloutNecessary(boolean shouldShow) {
         SharedPreferences prefs = ContextUtils.getAppSharedPreferences();
         prefs.edit().putBoolean(PREF_NEED_TO_SHOW_TAB_SWITCHER_CALLOUT, shouldShow).apply();
     }
 }