Re-land: cc: Remove WorkerPool class and instead use TaskGraphRunner directly.

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 415e7eac65892a7be7ee29059d1b93a36cc18568..9ce1babc9ee017ba91d6575ad28b4df7e27aeb8a 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -717,6 +717,9 @@ const char kNoReferrers[]                   = "no-referrers";
 // Disables the sandbox for all process types that are normally sandboxed.
 const char kNoSandbox[]                     = "no-sandbox";
 
+// Number of worker threads used to rasterize content.
+const char kNumRasterThreads[]              = "num-raster-threads";
+
 // Enables or disables history navigation in response to horizontal overscroll.
 // Set the value to '1' to enable the feature, and set to '0' to disable.
 // Defaults to enabled.