Enable FeatureList for the GPU process.

content/renderer/renderer_main.cc

Index: content/renderer/renderer_main.cc
diff --git a/content/renderer/renderer_main.cc b/content/renderer/renderer_main.cc
index e989b2722df81f3210589820680a54c6c058282c..6abfa066e71929fc722160b2b590d61746c55a8f 100644
--- a/content/renderer/renderer_main.cc
+++ b/content/renderer/renderer_main.cc
@@ -9,7 +9,6 @@
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/leak_annotations.h"
-#include "base/feature_list.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/field_trial.h"
@@ -155,24 +154,6 @@ int RendererMain(const MainFunctionParams& parameters) {
   base::android::RecordChromiumAndroidLinkerRendererHistogram();
 #endif
 
-  // Initialize statistical testing infrastructure.  We set the entropy provider
-  // to NULL to disallow the renderer process from creating its own one-time
-  // randomized trials; they should be created in the browser process.
-  base::FieldTrialList field_trial_list(NULL);
-  // Ensure any field trials in browser are reflected into renderer.
-  if (parsed_command_line.HasSwitch(switches::kForceFieldTrials)) {
-    bool result = base::FieldTrialList::CreateTrialsFromString(
-        parsed_command_line.GetSwitchValueASCII(switches::kForceFieldTrials),
-        std::set<std::string>());
-    DCHECK(result);
-  }
-
-  std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList);
-  feature_list->InitializeFromCommandLine(
-      parsed_command_line.GetSwitchValueASCII(switches::kEnableFeatures),
-      parsed_command_line.GetSwitchValueASCII(switches::kDisableFeatures));
-  base::FeatureList::SetInstance(std::move(feature_list));

[Alexei Svitkine (slow), 2016/05/03 18:59:47]

What happened to remove this? I don't see it in the latest patchset.

[erikchen, 2016/05/03 19:22:31]

Moving this logic to contain_main_runner causes problems with the global
descriptor table for renderer zygote processes on Linux. I spent some time
looking into it and couldn't figure it out, and didn't want to pour too much
time into this.

https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium...

-
   std::unique_ptr<scheduler::RendererScheduler> renderer_scheduler(
       scheduler::RendererScheduler::Create());