Changes to enable HTML5 autoplay for voice search.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/VoiceSearchTabHelper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/VoiceSearchTabHelper.java b/chrome/android/java/src/org/chromium/chrome/browser/VoiceSearchTabHelper.java
new file mode 100644
index 0000000000000000000000000000000000000000..e12a92f43c5657099664f67f9f86f56f9cdf901e
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/VoiceSearchTabHelper.java
@@ -0,0 +1,35 @@
+// Copyright 2013 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 org.chromium.content.browser.ContentViewCore;
+import org.chromium.content.browser.WebContents;
+import org.chromium.content.browser.WebContentsObserverAndroid;
+
+/**
+ * Tab helper to toggle media autoplay for voice URL searches.
+ */
+public class VoiceSearchTabHelper extends WebContentsObserverAndroid {
+    private static final String TAG = "VoiceSearchTabHelper";
+    private long mNativeVoiceSearchTabHelper;
+    private WebContents mWebContents;
+
+    /**
+     * Create an instance of VoiceSearchTabHelper.
+     *
+     * @param contentViewCore ContentViewCore to update media autoplay status.
+     */
+    public VoiceSearchTabHelper(ContentViewCore contentViewCore) {
+        super(contentViewCore);
+        mWebContents = contentViewCore.getWebContents();
+    }
+
+    @Override
+    public void navigationEntryCommitted() {
+        nativeUpdateAutoplayStatus(mWebContents);
+    }
+
+    private native void nativeUpdateAutoplayStatus(WebContents webContents);
+}