Revert of cc: Remove WorkerPool class and instead use TaskGraphRunner directly.

chrome/browser/about_flags.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/browser/about_flags.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 310 matching lines @@
     switches::kEnableZeroSuggestEtherSerp, ""},
   { IDS_FLAGS_ZERO_SUGGEST_ETHER_NO_SERP,
     switches::kEnableZeroSuggestEtherNoSerp, ""},
   { IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
     switches::kDisableZeroSuggest, ""}
 };
 #endif
 
 const Experiment::Choice kNumRasterThreadsChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
-  { IDS_FLAGS_NUM_RASTER_THREADS_ONE, switches::kNumRasterThreads, "1" },
-  { IDS_FLAGS_NUM_RASTER_THREADS_TWO, switches::kNumRasterThreads, "2" },
-  { IDS_FLAGS_NUM_RASTER_THREADS_THREE, switches::kNumRasterThreads, "3" },
-  { IDS_FLAGS_NUM_RASTER_THREADS_FOUR, switches::kNumRasterThreads, "4" }
+  { IDS_FLAGS_NUM_RASTER_THREADS_ONE, cc::switches::kNumRasterThreads, "1" },
+  { IDS_FLAGS_NUM_RASTER_THREADS_TWO, cc::switches::kNumRasterThreads, "2" },
+  { IDS_FLAGS_NUM_RASTER_THREADS_THREE, cc::switches::kNumRasterThreads, "3" },
+  { IDS_FLAGS_NUM_RASTER_THREADS_FOUR, cc::switches::kNumRasterThreads, "4" }
 };
 
 // We're using independent flags here (as opposed to a common flag with
 // different values) to be able to enable/disable the entire experience
 // associated with this feature server-side from the FieldTrial (the complete
 // experience includes other flag changes as well). It is not currently possible
 // to do that with "flag=value" flags.
 const Experiment::Choice kSearchButtonInOmniboxChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
   { IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
@@ skipping 2144 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags