Changes to enable HTML5 autoplay for voice search.

chrome/browser/chrome_content_browser_client.cc

 // Copyright (c) 2012 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/chrome_content_browser_client.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 2238 matching lines @@
   web_prefs->allow_displaying_insecure_content =
       prefs->GetBoolean(prefs::kWebKitAllowDisplayingInsecureContent);
   web_prefs->allow_running_insecure_content =
       prefs->GetBoolean(prefs::kWebKitAllowRunningInsecureContent);
 #if defined(OS_ANDROID)
   web_prefs->font_scale_factor =
       static_cast<float>(prefs->GetDouble(prefs::kWebKitFontScaleFactor));
   web_prefs->device_scale_adjustment = GetDeviceScaleAdjustment();
   web_prefs->force_enable_zoom =
       prefs->GetBoolean(prefs::kWebKitForceEnableZoom);
+  // Enables media autoplay to support audio playback for voice searches.
+  // Disabled in VoiceSearchTabHelper.
+  web_prefs->user_gesture_required_for_media_playback =
+      !google_util::IsGoogleSearchUrl(url);

[Ted C, 2013/12/17 17:52:22]

also, should this be checking against the voice search URL instead of a generic
google one?

[apiccion, 2013/12/17 18:53:37]

https://codereview.chromium.org/106103006/

talked to pkasting and decided check google urls simpler. 

 #endif
 
 #if defined(OS_ANDROID)
   web_prefs->password_echo_enabled =
       prefs->GetBoolean(prefs::kWebKitPasswordEchoEnabled);
 #else
   web_prefs->password_echo_enabled = browser_defaults::kPasswordEchoEnabled;
 #endif
 
   web_prefs->asynchronous_spell_checking_enabled = true;
@@ skipping 392 matching lines @@
 
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   return channel <= chrome::VersionInfo::CHANNEL_DEV;
 #else
   return false;
 #endif
 }
 
 
 }  // namespace chrome