Enable HTMLMediaElement@autoplay on Android

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

Index: chrome/android/java/src/org/chromium/chrome/browser/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
index cca0ac6dc0fbd114bef15cd4a72ebf978e0122b0..50f8b6cb35fde0da8e6ed80a1679875d79effd10 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
@@ -121,7 +121,6 @@ public class Tab implements NavigationClient {
     // Content layer Observers and Delegates
     private ContentViewClient mContentViewClient;
     private WebContentsObserverAndroid mWebContentsObserver;
-    private VoiceSearchTabHelper mVoiceSearchTabHelper;
     private TabChromeWebContentsDelegateAndroid mWebContentsDelegate;
     private DomDistillerFeedbackReporter mDomDistillerFeedbackReporter;
 
@@ -795,7 +794,6 @@ public class Tab implements NavigationClient {
 
         mWebContentsDelegate = createWebContentsDelegate();
         mWebContentsObserver = new TabWebContentsObserverAndroid(mContentViewCore.getWebContents());
-        mVoiceSearchTabHelper = new VoiceSearchTabHelper(mContentViewCore.getWebContents());
 
         if (mContentViewClient != null) mContentViewCore.setContentViewClient(mContentViewClient);
 
@@ -962,7 +960,6 @@ public class Tab implements NavigationClient {
         mContentViewCore = null;
         mWebContentsDelegate = null;
         mWebContentsObserver = null;
-        mVoiceSearchTabHelper = null;
 
         assert mNativeTabAndroid != 0;
         nativeDestroyWebContents(mNativeTabAndroid, deleteNativeWebContents);