Only set accessibility focus on page load for browser tabs, not web views.

chrome/android/java/src/org/chromium/chrome/browser/Tab.java

 // Copyright 2014 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;
 
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Color;
@@ skipping 812 matching lines @@
 
         if (AppBannerManager.isEnabled() && mAppBannerManager == null) {
             mAppBannerManager = new AppBannerManager(this);
         }
 
         if (DomDistillerFeedbackReporter.isEnabled() && mDomDistillerFeedbackReporter == null) {
             mDomDistillerFeedbackReporter = new DomDistillerFeedbackReporter(this);
         }
 
         for (TabObserver observer : mObservers) observer.onContentChanged(this);
+
+        // For browser tabs, we want to set accessibility focus to the page
+        // when it loads. This is not the default behavior for embedded
+        // web views.
+        mContentViewCore.setShouldSetAccessibilityFocusOnPageLoad(true);
     }
 
     /**
      * Cleans up all internal state, destroying any {@link NativePage} or {@link ContentViewCore}
      * currently associated with this {@link Tab}.  This also destroys the native counterpart
      * to this class, which means that all subclasses should erase their native pointers after
      * this method is called.  Once this call is made this {@link Tab} should no longer be used.
      */
     public void destroy() {
         for (TabObserver observer : mObservers) observer.onDestroyed(this);
@@ skipping 320 matching lines @@
     private native Profile nativeGetProfileAndroid(long nativeTabAndroid);
     private native int nativeLoadUrl(long nativeTabAndroid, String url, String extraHeaders,
             byte[] postData, int transition, String referrerUrl, int referrerPolicy,
             boolean isRendererInitiated);
     private native int nativeGetSecurityLevel(long nativeTabAndroid);
     private native void nativeSetActiveNavigationEntryTitleForUrl(long nativeTabAndroid, String url,
             String title);
     private native boolean nativePrint(long nativeTabAndroid);
     private native Bitmap nativeGetFavicon(long nativeTabAndroid);
 }