[part 2] Make classes and structures in modules fast-allocated.

Source/platform/audio/AudioProcessor.h

Index: Source/platform/audio/AudioProcessor.h
diff --git a/Source/platform/audio/AudioProcessor.h b/Source/platform/audio/AudioProcessor.h
index ec9e99460d61e62d80fb979e7ecf9debe1b3be63..ddc9fb00a821745b05fe6718166d30583179dd3d 100644
--- a/Source/platform/audio/AudioProcessor.h
+++ b/Source/platform/audio/AudioProcessor.h
@@ -32,6 +32,7 @@
 #define AudioProcessor_h
 
 #include "platform/PlatformExport.h"
+#include "wtf/FastAllocBase.h"
 
 namespace blink {
 
@@ -42,6 +43,7 @@ class AudioBus;
 // or as the processor for a basic (one input - one output) AudioNode.
 
 class PLATFORM_EXPORT AudioProcessor {
+    WTF_MAKE_FAST_ALLOCATED(AudioProcessor);
 public:
     AudioProcessor(float sampleRate, unsigned numberOfChannels)
         : m_initialized(false)