content: Improve thread priority for raster threads.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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 1505 matching lines @@
     switches::kTouchEvents,
     switches::kTouchTextSelectionStrategy,
     switches::kTraceConfigFile,
     switches::kTraceToConsole,
     switches::kUseCrossProcessFramesForGuests,
     switches::kUseFakeUIForMediaStream,
     // This flag needs to be propagated to the renderer process for
     // --in-process-webgl.
     switches::kUseGL,
     switches::kUseMobileUserAgent,
-    switches::kUseNormalPriorityForTileTaskWorkerThreads,
     switches::kUseRemoteCompositing,
     switches::kV,
     switches::kVideoThreads,
     switches::kVideoUnderflowThresholdMs,
     switches::kVModule,
     // Please keep these in alphabetical order. Compositor switches here should
     // also be added to chrome/browser/chromeos/login/chrome_restart_request.cc.
     cc::switches::kDisableCachedPictureRaster,
     cc::switches::kDisableCompositedAntialiasing,
     cc::switches::kDisableMainFrameBeforeActivation,
@@ skipping 1268 matching lines @@
 
     // Skip widgets in other processes.
     if (rvh->GetProcess()->GetID() != GetID())
       continue;
 
     rvh->OnWebkitPreferencesChanged();
   }
 }
 
 }  // namespace content