Implement setSinkId() for media elements without src.

third_party/WebKit/Source/modules/audio_output_devices/HTMLMediaElementAudioOutputDevice.cpp

 // Copyright 2015 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 "config.h"
 #include "modules/audio_output_devices/HTMLMediaElementAudioOutputDevice.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/ExecutionContext.h"
+#include "modules/audio_output_devices/AudioOutputDeviceClient.h"
 #include "modules/audio_output_devices/SetSinkIdCallbacks.h"
 #include "public/platform/WebSecurityOrigin.h"
 
 namespace blink {
 
 HTMLMediaElementAudioOutputDevice::HTMLMediaElementAudioOutputDevice()
     : m_sinkId("")
 {
 }
 
 String HTMLMediaElementAudioOutputDevice::sinkId(HTMLMediaElement& element)
 {
     HTMLMediaElementAudioOutputDevice& aodElement = HTMLMediaElementAudioOutputDevice::from(element);
     return aodElement.m_sinkId;
 }
 
 void HTMLMediaElementAudioOutputDevice::setSinkId(const String& sinkId)
 {
     m_sinkId = sinkId;
 }
 
 ScriptPromise HTMLMediaElementAudioOutputDevice::setSinkId(ScriptState* scriptState, HTMLMediaElement& element, const String& sinkId)
 {
     ASSERT(scriptState);
 
     WebMediaPlayer* webMediaPlayer = element.webMediaPlayer();
-    if (!webMediaPlayer)
-        return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(AbortError, "No media player available"));
-
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+    OwnPtr<SetSinkIdCallbacks> callbacks = adoptPtr(new SetSinkIdCallbacks(resolver, element, sinkId));
+    ScriptPromise promise = resolver->promise();
     ExecutionContext* context = scriptState->executionContext();
     ASSERT(context && context->isDocument());
 
-    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
-    webMediaPlayer->setSinkId(sinkId, WebSecurityOrigin(context->securityOrigin()), new SetSinkIdCallbacks(resolver, element, sinkId));
+    if (webMediaPlayer) {
+        webMediaPlayer->setSinkId(sinkId, WebSecurityOrigin(context->securityOrigin()), callbacks.leakPtr());
+    } else {
+        if (AudioOutputDeviceClient* client = AudioOutputDeviceClient::from(context)) {
+            client->checkAudioSink(context, sinkId, callbacks.release());
+        } else {
+            // The context has been detached. The promise will never settle.
+            ASSERT(context->activeDOMObjectsAreStopped());
+        }
+    }
+
     return resolver->promise();
 }
 
 const char* HTMLMediaElementAudioOutputDevice::supplementName()
 {
     return "HTMLMediaElementAudioOutputDevice";
 }
 
 HTMLMediaElementAudioOutputDevice& HTMLMediaElementAudioOutputDevice::from(HTMLMediaElement& element)
 {
     HTMLMediaElementAudioOutputDevice* supplement = static_cast<HTMLMediaElementAudioOutputDevice*>(WillBeHeapSupplement<HTMLMediaElement>::from(element, supplementName()));
     if (!supplement) {
         supplement = new HTMLMediaElementAudioOutputDevice();
         provideTo(element, supplementName(), adoptPtrWillBeNoop(supplement));
     }
     return *supplement;
 }
 
 DEFINE_TRACE(HTMLMediaElementAudioOutputDevice)
 {
     WillBeHeapSupplement<HTMLMediaElement>::trace(visitor);
 }
 
 } // namespace blink