Correct data size argument type in resource loading path to unsigned

Source/core/xml/XMLHttpRequest.cpp

Index: Source/core/xml/XMLHttpRequest.cpp
diff --git a/Source/core/xml/XMLHttpRequest.cpp b/Source/core/xml/XMLHttpRequest.cpp
index 69986e041d2e82d180eab8f692b98c05f61ad237..f9ef7321c32db0499be49587637d3bfddb1915e1 100644
--- a/Source/core/xml/XMLHttpRequest.cpp
+++ b/Source/core/xml/XMLHttpRequest.cpp
@@ -442,7 +442,7 @@ XMLHttpRequestUpload* XMLHttpRequest::upload()
     return m_upload.get();
 }
 
-void XMLHttpRequest::trackProgress(int length)
+void XMLHttpRequest::trackProgress(long long length)

[tkent, 2014/10/01 03:16:49]

Why |long long|?

[tyoshino (SeeGerritForStatus), 2014/10/01 03:36:09]

The argument of didDownloadData() is still "int". This should also be fixed but
in another CL. Until that, I'd like to replace this with a type with larger
range not to care about overflow on trackProgress() call in didReceiveData()
while making no change on the path from didDownloadData() to trackProgress()
where int is passed to trackProgress().

 {
     m_receivedLength += length;
 
@@ -1392,7 +1392,7 @@ void XMLHttpRequest::didReceiveResponse(unsigned long identifier, const Resource
         m_finalResponseCharset = response.textEncodingName();
 }
 
-void XMLHttpRequest::parseDocumentChunk(const char* data, int len)
+void XMLHttpRequest::parseDocumentChunk(const char* data, unsigned len)
 {
     if (!m_responseDocumentParser) {
         ASSERT(!m_responseDocument);
@@ -1436,7 +1436,7 @@ PassOwnPtr<TextResourceDecoder> XMLHttpRequest::createDecoder() const
     return TextResourceDecoder::create("text/plain", "UTF-8");
 }
 
-void XMLHttpRequest::didReceiveData(const char* data, int len)
+void XMLHttpRequest::didReceiveData(const char* data, unsigned len)
 {
     ASSERT(!m_downloadingToFile);
 
@@ -1454,9 +1454,6 @@ void XMLHttpRequest::didReceiveData(const char* data, int len)
     if (!len)
         return;
 
-    if (len == -1)
-        len = strlen(data);
-
     if (m_responseTypeCode == ResponseTypeDocument && responseIsHTML()) {
         parseDocumentChunk(data, len);
     } else if (m_responseTypeCode == ResponseTypeDefault || m_responseTypeCode == ResponseTypeText || m_responseTypeCode == ResponseTypeJSON || m_responseTypeCode == ResponseTypeDocument) {