Revert of Enable HTMLMediaElement@autoplay on Android

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 103 matching lines @@
     private ContentViewCore mContentViewCore;
 
     /**
      * A list of Tab observers.  These are used to broadcast Tab events to listeners.
      */
     private final ObserverList<TabObserver> mObservers = new ObserverList<TabObserver>();
 
     // Content layer Observers and Delegates
     private ContentViewClient mContentViewClient;
     private WebContentsObserverAndroid mWebContentsObserver;
+    private VoiceSearchTabHelper mVoiceSearchTabHelper;
     private TabChromeWebContentsDelegateAndroid mWebContentsDelegate;
     private DomDistillerFeedbackReporter mDomDistillerFeedbackReporter;
 
     /**
      * If this tab was opened from another tab, store the id of the tab that
      * caused it to be opened so that we can activate it when this tab gets
      * closed.
      */
     private int mParentId = INVALID_TAB_ID;
 
@@ skipping 653 matching lines @@
      */
     protected void setContentViewCore(ContentViewCore cvc) {
         NativePage previousNativePage = mNativePage;
         mNativePage = null;
         destroyNativePageInternal(previousNativePage);
 
         mContentViewCore = cvc;
 
         mWebContentsDelegate = createWebContentsDelegate();
         mWebContentsObserver = new TabWebContentsObserverAndroid(mContentViewCore.getWebContents());
+        mVoiceSearchTabHelper = new VoiceSearchTabHelper(mContentViewCore.getWebContents());
 
         if (mContentViewClient != null) mContentViewCore.setContentViewClient(mContentViewClient);
 
         assert mNativeTabAndroid != 0;
         nativeInitWebContents(
                 mNativeTabAndroid, mIncognito, mContentViewCore, mWebContentsDelegate,
                 new TabContextMenuPopulator(createContextMenuPopulator()));
 
         // In the case where restoring a Tab or showing a prerendered one we already have a
         // valid infobar container, no need to recreate one.
@@ skipping 146 matching lines @@
         destroyContentViewCoreInternal(mContentViewCore);
 
         if (mInfoBarContainer != null && mInfoBarContainer.getParent() != null) {
             mInfoBarContainer.removeFromParentView();
         }
         mContentViewCore.destroy();
 
         mContentViewCore = null;
         mWebContentsDelegate = null;
         mWebContentsObserver = null;
+        mVoiceSearchTabHelper = null;
 
         assert mNativeTabAndroid != 0;
         nativeDestroyWebContents(mNativeTabAndroid, deleteNativeWebContents);
     }
 
     /**
      * Gives subclasses the chance to clean up some state associated with this
      * {@link ContentViewCore}. This is because {@link #getContentViewCore()}
      * can return {@code null} if a {@link NativePage} is showing.
      *
@@ skipping 174 matching lines @@
     private native WebContents nativeGetWebContents(long nativeTabAndroid);
     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);
 }