Guard ResourceLoader::didReceiveData in error case.

Source/core/loader/ResourceLoader.cpp

Index: Source/core/loader/ResourceLoader.cpp
diff --git a/Source/core/loader/ResourceLoader.cpp b/Source/core/loader/ResourceLoader.cpp
index a4ca06f1696c03bcbba697ffc6a7322891364623..965f6b26d1fbd4c7a2f58f5e63b731b00e4929a7 100644
--- a/Source/core/loader/ResourceLoader.cpp
+++ b/Source/core/loader/ResourceLoader.cpp
@@ -354,6 +354,10 @@ void ResourceLoader::didReceiveResponse(ResourceHandle*, const ResourceResponse&
 
 void ResourceLoader::didReceiveData(ResourceHandle*, const char* data, int length, int encodedDataLength)
 {
+    // It is possible to receive data on uninitialized resources if it had an error status code, and we are running a nested message
+    // loop. When this occurs, ignoring the data is the correct action.
+    if (m_resource->response().httpStatusCode() >= 400 && !m_resource->shouldIgnoreHTTPStatusCodeErrors())
+        return;
     InspectorInstrumentationCookie cookie = InspectorInstrumentation::willReceiveResourceData(m_frame.get(), identifier(), encodedDataLength);
     ASSERT(m_state == Initialized);