Add memory ablation experiment.

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 612d16bd9b979e17f1d464c2d04a4f4b911389bd..e8c36382cdacd55e43a5081012ba22b1d1d125e3 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -60,6 +60,7 @@
 #include "chrome/browser/component_updater/supervised_user_whitelist_installer.h"
 #include "chrome/browser/component_updater/widevine_cdm_component_installer.h"
 #include "chrome/browser/defaults.h"
+#include "chrome/browser/experiments/memory_ablation_experiment.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/geolocation/chrome_access_token_store.h"
 #include "chrome/browser/gpu/gpu_profile_cache.h"
@@ -1429,6 +1430,10 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
   // blocking pool, which is disabled until the CreateThreads phase of startup.
   SetupMetrics();
 
+  // Can't be in SetupFieldTrials() because it needs a task runner.
+  MemoryAblationExperiment::MaybeStart(
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
+
 #if defined(OS_WIN)
   // Windows parental controls calls can be slow, so we do an early init here
   // that calculates this value off of the UI thread.