Allow tracing to console everywhere.

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 987 matching lines @@
     // This flag needs to be propagated to the renderer process for
     // --in-process-webgl.
     switches::kUseGL,
     switches::kUseMobileUserAgent,
     switches::kUserAgent,
     switches::kV,
     switches::kVideoThreads,
     switches::kVModule,
     switches::kWebCoreLogChannels,
     switches::kEnableWebGLDraftExtensions,
+    switches::kTraceToConsole,

[piman, 2013/07/03 19:52:23]

nit: you'll probably also want to add it to BrowserChildProcessHostImpl::Launch

     // Please keep these in alphabetical order. Compositor switches here should
     // also be added to chrome/browser/chromeos/login/chrome_restart_request.cc.
     cc::switches::kBackgroundColorInsteadOfCheckerboard,
     cc::switches::kCompositeToMailbox,
     cc::switches::kDisableImplSidePainting,
     cc::switches::kDisableThreadedAnimation,
     cc::switches::kEnableImplSidePainting,
     cc::switches::kEnablePartialSwap,
     cc::switches::kEnablePerTilePainting,
     cc::switches::kEnablePinchVirtualViewport,
@@ skipping 766 matching lines @@
     // Skip widgets in other processes.
     if (widgets[i]->GetProcess()->GetID() != GetID())
       continue;
 
     RenderViewHost* rvh = RenderViewHost::From(widgets[i]);
     rvh->UpdateWebkitPreferences(rvh->GetWebkitPreferences());
   }
 }
 
 }  // namespace content