Autoplay: use an autoplay policy setting in Blink.

third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLMediaElement.h"
+#include "core/html/media/AutoplayPolicy.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/inspector/ConsoleTypes.h"
 #include "modules/mediastream/MediaStream.h"
 #include "modules/webaudio/AnalyserNode.h"
 #include "modules/webaudio/AudioBuffer.h"
 #include "modules/webaudio/AudioBufferCallback.h"
 #include "modules/webaudio/AudioBufferSourceNode.h"
 #include "modules/webaudio/AudioContext.h"
 #include "modules/webaudio/AudioListener.h"
 #include "modules/webaudio/AudioNodeInput.h"
@@ skipping 49 matching lines @@
       user_gesture_required_(false),
       connection_count_(0),
       deferred_task_handler_(DeferredTaskHandler::Create()),
       context_state_(kSuspended),
       closed_context_sample_rate_(-1),
       periodic_wave_sine_(nullptr),
       periodic_wave_square_(nullptr),
       periodic_wave_sawtooth_(nullptr),
       periodic_wave_triangle_(nullptr),
       output_position_() {
-  // If mediaPlaybackRequiresUserGesture is enabled, cross origin iframes will
-  // require user gesture for the AudioContext to produce sound.
-  if (document->GetSettings() &&
-      document->GetSettings()->GetMediaPlaybackRequiresUserGesture() &&
+  // If the autoplay policy requires a user gesture, cross origin iframes will
+  // require user gesture for the AudioContext to produce sound. This apply even
+  // if the autoplay policy requires user gesture for top frames.
+  if (AutoplayPolicy::GetAutoplayPolicyForDocument(*document) !=
+          AutoplayPolicy::Type::kNoUserGestureRequired &&
       document->GetFrame() && document->GetFrame()->IsCrossOriginSubframe()) {
     autoplay_status_ = AutoplayStatus::kAutoplayStatusFailed;
     user_gesture_required_ = true;
   }
 }
 
 // Constructor for offline (non-realtime) rendering.
 BaseAudioContext::BaseAudioContext(Document* document,
                                    unsigned number_of_channels,
                                    size_t number_of_frames,
@@ skipping 798 matching lines @@
 }
 
 SecurityOrigin* BaseAudioContext::GetSecurityOrigin() const {
   if (GetExecutionContext())
     return GetExecutionContext()->GetSecurityOrigin();
 
   return nullptr;
 }
 
 }  // namespace blink