Fix accessibility issues in custom tab UI

chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarPhone.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.toolbar;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
@@ skipping 20 matching lines @@
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
 import android.view.ViewGroup;
 import android.view.WindowManager;
 import android.view.animation.LinearInterpolator;
 import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.TextView;
-import android.widget.Toast;
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.SysUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.Tab;
 import org.chromium.chrome.browser.compositor.Invalidator;
 import org.chromium.chrome.browser.document.BrandColorUtils;
 import org.chromium.chrome.browser.ntp.NewTabPage;
@@ skipping 341 matching lines @@
                 RecordUserAction.record("MobileNewTabOpened");
                 // TODO(kkimlabs): Record UMA action for homepage button.
             }
         } else if (mHomeButton == v) {
             openHomepage();
         }
     }
 
     @Override
     public boolean onLongClick(View v) {
-        int stringResourceId = -1;
+        int stringResourceId = 0;
         if (v == mToggleTabStackButton) {
             stringResourceId = R.string.open_tabs;
+        } else {
+            return false;
         }
-        if (stringResourceId != -1) {
-            Context ctx = getContext();
-            // Display the tooltip for the view being long clicked.
-            final int screenWidth = getResources().getDisplayMetrics().widthPixels;
-            final int[] screenPos = new int[2];
-            v.getLocationOnScreen(screenPos);
-            final int width = v.getWidth();
-
-            Toast toast = Toast.makeText(
-                    ctx, getResources().getString(stringResourceId), Toast.LENGTH_SHORT);
-            toast.setGravity(
-                    Gravity.TOP | Gravity.END,
-                    screenWidth - screenPos[0] - width / 2,
-                    getHeight());
-            toast.show();
-            return true;
-        }
-        return false;
+        return showAccessibilityToast(v, stringResourceId);
     }
 
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         if (!mDisableLocationBarRelayout) {
             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 
             boolean changed = layoutLocationBar(MeasureSpec.getSize(widthMeasureSpec));
             if (!mInTabSwitcherMode) setUrlFocusChangePercent(mUrlFocusChangePercent);
             if (!changed) return;
@@ skipping 1459 matching lines @@
 
         getMenuButton().setVisibility(shouldShowMenuButton() ? View.VISIBLE : View.GONE);
     }
 
     @Override
     public LocationBar getLocationBar() {
         return mPhoneLocationBar;
     }
 }