[WebSocket] bufferedAmount should not decrease inside a task.

Source/web/WebSocketImpl.cpp

Index: Source/web/WebSocketImpl.cpp
diff --git a/Source/web/WebSocketImpl.cpp b/Source/web/WebSocketImpl.cpp
index a83ba25326394e7a51e9478dbee80c0b17c33252..a51f536e217b09c3481b3604a76f2741b0b7f688 100644
--- a/Source/web/WebSocketImpl.cpp
+++ b/Source/web/WebSocketImpl.cpp
@@ -151,9 +151,14 @@ void WebSocketImpl::didReceiveMessageError()
     m_client->didReceiveMessageError();
 }
 
-void WebSocketImpl::didUpdateBufferedAmount(unsigned long bufferedAmount)
+void WebSocketImpl::didIncreaseBufferedAmount(unsigned long amount)
 {
-    m_client->didUpdateBufferedAmount(bufferedAmount);
+    m_client->didIncreaseBufferedAmount(amount);
+}
+
+void WebSocketImpl::didDecreaseBufferedAmount(unsigned long amount)
+{
+    m_client->didDecreaseBufferedAmount(amount);
 }
 
 void WebSocketImpl::didStartClosingHandshake()