20956. r=rpotts. necko no longer assumes any MIME type. we send out application/x-unknown-content-type internal MIME type if we don't *know* what the type is. It's now truly up to the app to figure out what to do

netwerk/base/public/netCore.h

@@ -47,6 +47,9 @@
 #define NS_ERROR_IN_PROGRESS \
     NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_NETWORK, 15)
 
+// internal unknown content-type
+#define UNKNOWN_MIME "application/x-unknown-content-type"
+
 #undef NS_NET
 #ifdef _IMPL_NS_NET
 #ifdef XP_PC

netwerk/protocol/file/src/nsFileChannel.cpp

@@ -369,8 +369,6 @@ nsFileChannel::SetLoadAttributes(PRUint32 aLoadAttributes)
     return NS_OK;
 }
 
-#define DUMMY_TYPE "text/html"
-
 NS_IMETHODIMP
 nsFileChannel::GetContentType(char * *aContentType)
 {
@@ -388,8 +386,7 @@ nsFileChannel::GetContentType(char * *aContentType)
         if (NS_SUCCEEDED(rv)) return rv;
     }
 
-    // if all else fails treat it as text/html?
-    *aContentType = nsCRT::strdup(DUMMY_TYPE);
+    *aContentType = nsCRT::strdup(UNKNOWN_MIME);
     if (!*aContentType) {
         return NS_ERROR_OUT_OF_MEMORY;
     } else {

netwerk/protocol/ftp/src/nsFTPChannel.cpp

@@ -423,10 +423,8 @@ nsFTPChannel::GetContentType(char* *aContentType) {
         }
     }
 
-    // if all else fails treat it as unknown?
-    // XXX this will go away once we have AsyncOpen in place.
 	if (!*aContentType) 
-		*aContentType = nsCRT::strdup("application/x-unknown-content-type");
+		*aContentType = nsCRT::strdup(UNKNOWN_MIME);
     if (!*aContentType) {
         rv = NS_ERROR_OUT_OF_MEMORY;
     } else {