Remove support for "name" parameter from Content-Disposition.

net/http/http_content_disposition.h

Index: net/http/http_content_disposition.h
diff --git a/net/http/http_content_disposition.h b/net/http/http_content_disposition.h
index 2b4ca709eb3cbb581bab6c9101eda889fc0a3141..c96ba6186034b558a1c0d20104396290df7f6507 100644
--- a/net/http/http_content_disposition.h
+++ b/net/http/http_content_disposition.h
@@ -19,7 +19,9 @@ class NET_EXPORT HttpContentDisposition {
     ATTACHMENT,
   };
 
-  // Properties of the Content-Disposition header. Used for UMA.
+  // Properties of the Content-Disposition header. These flags are used to
+  // report download metrics in UMA. This enum isn't directly used in UMA but
+  // mapped to another one for binary compatiblity; ie. changes are OK.
   enum ParseResultFlags {
     INVALID                      = 0,
 
@@ -29,25 +31,22 @@ class NET_EXPORT HttpContentDisposition {
     // The disposition-type is not 'inline' or 'attachment'.
     HAS_UNKNOWN_DISPOSITION_TYPE = 1 << 1,
 
-    // Has a valid non-empty 'name' attribute.
-    HAS_NAME                     = 1 << 2,
-
     // Has a valid non-empty 'filename' attribute.
-    HAS_FILENAME                 = 1 << 3,
+    HAS_FILENAME                 = 1 << 2,
 
     // Has a valid non-empty 'filename*' attribute.
-    HAS_EXT_FILENAME             = 1 << 4,
+    HAS_EXT_FILENAME             = 1 << 3,
 
     // The following fields are properties of the 'filename' attribute:
 
     // Quoted-string contains non-ASCII characters.
-    HAS_NON_ASCII_STRINGS        = 1 << 5,
+    HAS_NON_ASCII_STRINGS        = 1 << 4,
 
     // Quoted-string contains percent-encoding.
-    HAS_PERCENT_ENCODED_STRINGS  = 1 << 6,
+    HAS_PERCENT_ENCODED_STRINGS  = 1 << 5,
 
     // Quoted-string contains RFC 2047 encoded words.
-    HAS_RFC2047_ENCODED_STRINGS  = 1 << 7
+    HAS_RFC2047_ENCODED_STRINGS  = 1 << 6
   };
 
   HttpContentDisposition(const std::string& header,