Remove --no-js-randomness. Only used by perftracker, which is dead.

chrome/renderer/chrome_content_renderer_client.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/chrome_content_renderer_client.h"
 
 #include "base/command_line.h"
 #include "base/debug/crash_logging.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 285 matching lines @@
 
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kEnableBenchmarking))
     thread->RegisterExtension(extensions_v8::BenchmarkingExtension::Get());
   if (command_line->HasSwitch(switches::kEnableNetBenchmarking))
     thread->RegisterExtension(extensions_v8::NetBenchmarkingExtension::Get());
   if (command_line->HasSwitch(switches::kInstantProcess))
     thread->RegisterExtension(extensions_v8::SearchBoxExtension::Get());
 
   if (command_line->HasSwitch(switches::kPlaybackMode) ||
-      command_line->HasSwitch(switches::kRecordMode) ||
-      command_line->HasSwitch(switches::kNoJsRandomness)) {
+      command_line->HasSwitch(switches::kRecordMode)) {

[tonyg, 2014/05/19 14:38:04]

I think these and the entire PlaybackExtension are good candidates for deletion
in a follow-up as well.

[Peter Kasting, 2014/05/19 14:42:43]

In the flags doc these are currently untriaged, and assigned to cbentzel (who
has the largest set of untriaged flags of anyone, so they're not getting
attention).

If you're confident enough to remove these and the playback extension, would you
be willing to take over the flags in the doc and file a relevant bug?

     thread->RegisterExtension(extensions_v8::PlaybackExtension::Get());
   }
 
   // TODO(guohui): needs to forward the new-profile-management switch to
   // renderer processes.
   if (switches::IsNewProfileManagement())
     thread->RegisterExtension(extensions_v8::PrincipalsExtension::Get());
 
   // chrome:, chrome-search:, chrome-devtools:, and chrome-distiller: pages
   // should not be accessible by normal content, and should also be unable to
@@ skipping 1126 matching lines @@
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   return !command_line->HasSwitch(extensions::switches::kExtensionProcess);
 }
 
 blink::WebWorkerPermissionClientProxy*
 ChromeContentRendererClient::CreateWorkerPermissionClientProxy(
     content::RenderFrame* render_frame,
     blink::WebFrame* frame) {
   return new WorkerPermissionClientProxy(render_frame, frame);
 }