content: Rename num raster threads -> num worker threads.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index d17d359334c3533da6d5266502ddf2ba036d1260..20c5675533105db80b7ce3497e8a9179a272b742 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -787,19 +787,19 @@ void RenderThreadImpl::Init(
       base::Bind(&RenderThreadImpl::OnSyncMemoryPressure,
                  base::Unretained(this))));
 
-  int num_raster_threads = 0;
+  int num_categorized_worker_threads = 0;
   std::string string_value =
-      command_line.GetSwitchValueASCII(switches::kNumRasterThreads);
-  bool parsed_num_raster_threads =
-      base::StringToInt(string_value, &num_raster_threads);
-  DCHECK(parsed_num_raster_threads) << string_value;
-  DCHECK_GT(num_raster_threads, 0);
+      command_line.GetSwitchValueASCII(switches::kNumCategorizedWorkerThreads);
+  bool parsed_num_categorized_worker_threads =
+      base::StringToInt(string_value, &num_categorized_worker_threads);
+  DCHECK(parsed_num_categorized_worker_threads) << string_value;
+  DCHECK_GT(num_categorized_worker_threads, 0);
 
   // TODO(vmpstr): If the flag sticks, we should clean it up and always have
   // image decode tasks.
   are_image_decode_tasks_enabled_ = true;
 
-  categorized_worker_pool_->Start(num_raster_threads);
+  categorized_worker_pool_->Start(num_categorized_worker_threads);
 
   // TODO(boliu): In single process, browser main loop should set up the
   // discardable memory manager, and should skip this if kSingleProcess.