Remove ArrayBufferDeallocationObserver

Source/wtf/WTF.h

Index: Source/wtf/WTF.h
diff --git a/Source/wtf/WTF.h b/Source/wtf/WTF.h
index c62e9eddf89fbe873eace740b1e0ff77e458f777..4f5454972df7c2c9c5a98d33d72319d63b856a77 100644
--- a/Source/wtf/WTF.h
+++ b/Source/wtf/WTF.h
@@ -38,9 +38,10 @@
 namespace WTF {
 
 typedef void(*HistogramEnumerationFunction)(const char* name, int sample, int boundaryValue);
+typedef void(*AdjustAmountOfExternalAllocatedMemoryFunction)(int size);
 
 // This function must be called exactly once from the main thread before using anything else in WTF.
-WTF_EXPORT void initialize(TimeFunction currentTimeFunction, TimeFunction monotonicallyIncreasingTimeFunction, TimeFunction systemTraceTimeFunction, HistogramEnumerationFunction);
+WTF_EXPORT void initialize(TimeFunction currentTimeFunction, TimeFunction monotonicallyIncreasingTimeFunction, TimeFunction systemTraceTimeFunction, HistogramEnumerationFunction, AdjustAmountOfExternalAllocatedMemoryFunction);
 WTF_EXPORT void shutdown();
 WTF_EXPORT bool isShutdown();