Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/ConvolverNodeTest.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/webaudio/ConvolverNode.h"
 
 #include "core/testing/DummyPageHolder.h"
 #include "modules/webaudio/OfflineAudioContext.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 
 TEST(ConvolverNodeTest, ReverbLifetime)
 {
     OwnPtr<DummyPageHolder> page = DummyPageHolder::create();
     OfflineAudioContext* context = OfflineAudioContext::create(&page->document(), 2, 1, 48000, ASSERT_NO_EXCEPTION);
     ConvolverNode* node = context->createConvolver(ASSERT_NO_EXCEPTION);
     ConvolverHandler& handler = node->convolverHandler();
     EXPECT_FALSE(handler.m_reverb);
     node->setBuffer(AudioBuffer::create(2, 1, 48000), ASSERT_NO_EXCEPTION);
     EXPECT_TRUE(handler.m_reverb);
-    AudioContext::AutoLocker locker(context);
+    AbstractAudioContext::AutoLocker locker(context);
     handler.dispose();
     // m_reverb should live after dispose() because an audio thread is using it.
     EXPECT_TRUE(handler.m_reverb);
 }
 
 } // namespace blink