Disable memory caching of XHRs

third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp

Index: third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
diff --git a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
index a5f3a481a25d3a0fd03dbc41abce24abaf38ab11..0982a5e965c817b4fcd396e7e0e05014bd2e1803 100644
--- a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
+++ b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
@@ -1022,6 +1022,10 @@ void XMLHttpRequest::createRequest(PassRefPtr<EncodedFormData> httpBody,
     resourceLoaderOptions.dataBufferingPolicy = DoNotBufferData;
   }
 
+  if (m_async) {
+    resourceLoaderOptions.dataBufferingPolicy = DoNotBufferData;
+  }
+
   m_exceptionCode = 0;
   m_error = false;