Add category handling to RasterWorkerPool

content/public/common/content_switches.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 "build/build_config.h"
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
@@ skipping 807 matching lines @@
 const char kUseMobileUserAgent[] = "use-mobile-user-agent";
 
 // Use normal priority for tile task worker threads.  Otherwise they may
 // be run at background priority on some platforms.
 const char kUseNormalPriorityForTileTaskWorkerThreads[] =
     "use-normal-priority-for-tile-task-worker-threads";
 
 // Use remote compositor for the renderer.
 const char kUseRemoteCompositing[] = "use-remote-compositing";
 
+// Causes all low-priority "background" raster tasks to run on a single thread,
+// reducing their likelihood of contending with higher priority tasks for system
+// resources.
+const char kUseSingleThreadForBackgroundRasterTasks[] =
+    "use-single-thread-for-background-raster-tasks";
+
 // Use the new surfaces system to handle compositor delegation.
 const char kUseSurfaces[] = "use-surfaces";
 
 // Disable the use of the new surfaces system to handle compositor delegation.
 const char kDisableSurfaces[] = "disable-surfaces";
 
 // The contents of this flag are prepended to the utility process command line.
 // Useful values might be "valgrind" or "xterm -e gdb --args".
 const char kUtilityCmdPrefix[]              = "utility-cmd-prefix";
 
@@ skipping 157 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches