Remove the WEB_AUDIO compile time flag

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
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 #include "modules/webaudio/ChannelMergerNode.h"
-
-#if ENABLE(WEB_AUDIO)
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "modules/webaudio/AbstractAudioContext.h"
 #include "modules/webaudio/AudioNodeInput.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 
 
 namespace blink {
@@ skipping 87 matching lines @@
 
 ChannelMergerNode* ChannelMergerNode::create(AbstractAudioContext& context, float sampleRate, unsigned numberOfInputs)
 {
     if (!numberOfInputs || numberOfInputs > AbstractAudioContext::maxNumberOfChannels())
         return nullptr;
     return new ChannelMergerNode(context, sampleRate, numberOfInputs);
 }
 
 } // namespace blink
 
-#endif // ENABLE(WEB_AUDIO)