Temporarily remove enable-websocket-auth-connection-reuse from about:flags

The M68 branch has a non-working implementation of the
enable-websocket-auth-connection-reuse flag. In order to avoid the
confusion of having a flag that works in some versions and not in
others, temporarily remove the flag from about:flags.

Once the flag has been disabled in the M68 branch it will be re-enabled
for M69 by reverting this CL.

BUG=423609

Change-Id: Id17ac18e13effcfd5bd946dc1fe0f1c70df96539
Reviewed-on: https://chromium-review.googlesource.com/1090700
Commit-Queue: Adam Rice <ricea@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566730}

chrome/browser/about_flags.cc

@@ -3877,11 +3877,6 @@ const FeatureEntry kFeatureEntries[] = {
      FEATURE_VALUE_TYPE(ash::features::kTapVisualizerApp)},
 #endif
 
-    {"enable-websocket-auth-connection-reuse",
-     flag_descriptions::kWebSocketHandshakeReuseConnectionName,
-     flag_descriptions::kWebSocketHandshakeReuseConnectionDescription, kOsAll,
-     FEATURE_VALUE_TYPE(net::WebSocketBasicHandshakeStream::
-                            kWebSocketHandshakeReuseConnection)},
     {"unsafely-treat-insecure-origin-as-secure",
      flag_descriptions::kTreatInsecureOriginAsSecureName,
      flag_descriptions::kTreatInsecureOriginAsSecureDescription, kOsAll,

chrome/browser/flag_descriptions.cc

@@ -1924,13 +1924,6 @@ const char kWebrtcStunOriginDescription[] =
     "When enabled, Stun messages generated by WebRTC will contain the Origin "
     "header.";
 
-const char kWebSocketHandshakeReuseConnectionName[] =
-    "Enable WebSocket connection reuse for authentication";
-const char kWebSocketHandshakeReuseConnectionDescription[] =
-    "Permits the WebSocket handshake to keep the connection open after an "
-    "authentication failure. The connection may be used for further requests "
-    "to send credentials. This is sometimes needed for Windows authentication.";
-
 const char kWebvrName[] = "WebVR";
 const char kWebvrDescription[] =
     "Enables access to experimental Virtual Reality functionality via the "

chrome/browser/flag_descriptions.h

@@ -1173,9 +1173,6 @@ extern const char kWebrtcStunOriginDescription[];
 extern const char kWebrtcH264WithOpenh264FfmpegName[];
 extern const char kWebrtcH264WithOpenh264FfmpegDescription[];
 
-extern const char kWebSocketHandshakeReuseConnectionName[];
-extern const char kWebSocketHandshakeReuseConnectionDescription[];
-
 extern const char kWebvrName[];
 extern const char kWebvrDescription[];