throw away os._Error.

make some error types in a few packages

R=r
DELTA=110  (25 added, 46 deleted, 39 changed)
OCL=28382
CL=28561

1 files changed, 9 insertions, 6 deletions

diff --git a/src/lib/http/request.go b/src/lib/http/request.go
index 3edaa4207..1173dd2a2 100644
--- a/src/lib/http/request.go
+++ b/src/lib/http/request.go
@@ -26,13 +26,16 @@ const (
 )
 
 // HTTP request parsing errors.
+type ProtocolError struct {
+	os.ErrorString
+}
 var (
-	LineTooLong = os.NewError("http header line too long");
-	ValueTooLong = os.NewError("http header value too long");
-	HeaderTooLong = os.NewError("http header too long");
-	BadHeader = os.NewError("malformed http header");
-	BadRequest = os.NewError("invalid http request");
-	BadHTTPVersion = os.NewError("unsupported http version");
+	LineTooLong = &ProtocolError{"http header line too long"};
+	ValueTooLong = &ProtocolError{"http header value too long"};
+	HeaderTooLong = &ProtocolError{"http header too long"};
+	BadHeader = &ProtocolError{"malformed http header"};
+	BadRequest = &ProtocolError{"invalid http request"};
+	BadHTTPVersion = &ProtocolError{"unsupported http version"};
 )
 
 // A Request represents a parsed HTTP request header.