Setting --enable-gpu-benchmarking should force all Finch trials to default

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index 3f65f354c154e4b87a7a033b43048d576a404096..c2db01698fc45a3d75b5b192c473d47238b63c2b 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -37,6 +37,7 @@
 #include "base/time/time.h"
 #include "base/values.h"
 #include "build/build_config.h"
+#include "cc/base/switches.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_impl.h"
@@ -601,8 +602,10 @@ void ChromeBrowserMainParts::SetupMetricsAndFieldTrials() {
       new base::FieldTrialList(metrics->CreateEntropyProvider().release()));
 
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(switches::kEnableBenchmarking))
+  if (command_line->HasSwitch(switches::kEnableBenchmarking) ||
+      command_line->HasSwitch(cc::switches::kEnableGpuBenchmarking)) {
     base::FieldTrial::EnableBenchmarking();
+  }
 
   // Ensure any field trials specified on the command line are initialized.
   if (command_line->HasSwitch(switches::kForceFieldTrials)) {