Correct data size argument type in resource loading path to unsigned

Source/core/loader/DocumentThreadableLoader.cpp

Index: Source/core/loader/DocumentThreadableLoader.cpp
diff --git a/Source/core/loader/DocumentThreadableLoader.cpp b/Source/core/loader/DocumentThreadableLoader.cpp
index e44cdc440077adbe04b84766eeccfd586c95fb34..15e351a0bce9f3b6f676d73c3ae81d5163130cbb 100644
--- a/Source/core/loader/DocumentThreadableLoader.cpp
+++ b/Source/core/loader/DocumentThreadableLoader.cpp
@@ -396,13 +396,13 @@ void DocumentThreadableLoader::handleResponse(unsigned long identifier, const Re
     m_client->didReceiveResponse(identifier, response);
 }
 
-void DocumentThreadableLoader::dataReceived(Resource* resource, const char* data, int dataLength)
+void DocumentThreadableLoader::dataReceived(Resource* resource, const char* data, unsigned dataLength)
 {
     ASSERT_UNUSED(resource, resource == this->resource());
     handleReceivedData(data, dataLength);
 }
 
-void DocumentThreadableLoader::handleReceivedData(const char* data, int dataLength)
+void DocumentThreadableLoader::handleReceivedData(const char* data, unsigned dataLength)
 {
     ASSERT(m_client);
     // Preflight data should be invisible to clients.