[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/webaudio/ScriptProcessorNode.h

 /*
  * 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ScriptProcessorNode_h
 #define ScriptProcessorNode_h
 
 #include "base/gtest_prod_util.h"
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "modules/webaudio/AudioNode.h"
 #include "platform/audio/AudioBus.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class AbstractAudioContext;
@@ skipping 44 matching lines @@
     unsigned m_numberOfInputChannels;
     unsigned m_numberOfOutputChannels;
 
     RefPtr<AudioBus> m_internalInputBus;
     // Synchronize process() with fireProcessEvent().
     mutable Mutex m_processEventLock;
 
     FRIEND_TEST_ALL_PREFIXES(ScriptProcessorNodeTest, BufferLifetime);
 };
 
-class ScriptProcessorNode final : public AudioNode {
+class ScriptProcessorNode final : public AudioNode, public ActiveScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     // bufferSize must be one of the following values: 256, 512, 1024, 2048,
     // 4096, 8192, 16384.
     // This value controls how frequently the onaudioprocess event handler is
     // called and how many sample-frames need to be processed each call.
     // Lower numbers for bufferSize will result in a lower (better)
     // latency. Higher numbers will be necessary to avoid audio breakup and
     // glitches.
     // The value chosen must carefully balance between latency and audio quality.
     static ScriptProcessorNode* create(AbstractAudioContext&, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(audioprocess);
     size_t bufferSize() const;
 
-    // ScriptWrappable
+    // ActiveScriptWrappable
     bool hasPendingActivity() const final;
 
 private:
     ScriptProcessorNode(AbstractAudioContext&, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels);
 };
 
 } // namespace blink
 
 #endif // ScriptProcessorNode_h