Changes to enable HTML5 autoplay for voice search.

chrome/browser/android/voice_search_tab_helper.cc

Index: chrome/browser/android/voice_search_tab_helper.cc
diff --git a/chrome/browser/android/voice_search_tab_helper.cc b/chrome/browser/android/voice_search_tab_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e930128cfe28c5cb2e5d529912f03c394a176dc9
--- /dev/null
+++ b/chrome/browser/android/voice_search_tab_helper.cc
@@ -0,0 +1,37 @@
+// 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.
+
+#include "chrome/browser/android/voice_search_tab_helper.h"
+
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+#include "jni/VoiceSearchTabHelper_jni.h"
+#include "webkit/common/webpreferences.h"
+
+using content::WebContents;
+
+// Register native methods
+bool RegisterVoiceSearchTabHelper(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+static jlong Init(JNIEnv* env, jobject obj, jobject j_web_contents) {
+  WebContents* web_contents = WebContents::FromJavaWebContents(j_web_contents);
+  VoiceSearchTabHelper* helper = new VoiceSearchTabHelper(web_contents);
+  return reinterpret_cast<intptr_t>(helper);
+}
+
+VoiceSearchTabHelper::VoiceSearchTabHelper(WebContents* web_contents)
+    : web_contents_(web_contents) {
+}
+
+void VoiceSearchTabHelper::SetMediaAutoplayEnabled(JNIEnv* env,
+                                                   jobject obj,
+                                                   jboolean is_enabled) {
+  content::RenderViewHost* host = web_contents_->GetRenderViewHost();
+  WebPreferences prefs = host->GetWebkitPreferences();
+  prefs.user_gesture_required_for_media_playback = true;
+  host->UpdateWebkitPreferences(prefs);
+}
+