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

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 044a9afe010306bcaf6ae237d78661d2b1967ac4..f57f12bf502f9d4f60982d07c5da09d6f98abe9c 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -303,8 +303,7 @@ void ChromeContentRendererClient::RenderThreadStarted() {
     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());
   }