Revert of Changes to enable HTML5 autoplay for voice search.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java b/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
index 66b7dbb0be7ff510473c5734a8eb65dafcffe5a8..936f376b986785f01f781f4f6c3cea7a92943209 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/TabBase.java
@@ -99,7 +99,6 @@
     // Content layer Observers and Delegates
     private ContentViewClient mContentViewClient;
     private WebContentsObserverAndroid mWebContentsObserver;
-    private VoiceSearchTabHelper mVoiceSearchTabHelper;
     private TabBaseChromeWebContentsDelegateAndroid mWebContentsDelegate;
 
     /**
@@ -615,7 +614,6 @@
         mContentViewCore = mContentView.getContentViewCore();
         mWebContentsDelegate = createWebContentsDelegate();
         mWebContentsObserver = new TabBaseWebContentsObserverAndroid(mContentViewCore);
-        mVoiceSearchTabHelper = new VoiceSearchTabHelper(mContentViewCore);
 
         if (mContentViewClient != null) mContentViewCore.setContentViewClient(mContentViewClient);
 
@@ -721,7 +719,6 @@
         mContentViewCore = null;
         mWebContentsDelegate = null;
         mWebContentsObserver = null;
-        mVoiceSearchTabHelper = null;
 
         assert mNativeTabAndroid != 0;
         nativeDestroyWebContents(mNativeTabAndroid, deleteNativeWebContents);