Revert of Make the EarlyInitStartup Code 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 e0b4ff2a9def556cd9a0a78249c072210de03397..58be71c5dd7d5f2a5b8cf1b2391c9cb1744b28e0 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1231,13 +1231,16 @@
 #endif
 
 #if defined(ENABLE_EXTENSIONS)
-  // Try to compute this early on another thread so that we don't spend time
-  // during profile load initializing the extensions APIs.
-  BrowserThread::PostTask(
-      BrowserThread::FILE_USER_BLOCKING,
-      FROM_HERE,
-      base::Bind(
-          base::IgnoreResult(&extensions::FeatureProvider::GetAPIFeatures)));
+  if (!variations::GetVariationParamValue(
+      "LightSpeed", "EarlyInitStartup").empty()) {
+    // Try to compute this early on another thread so that we don't spend time
+    // during profile load initializing the extensions APIs.
+    BrowserThread::PostTask(
+        BrowserThread::FILE_USER_BLOCKING,
+        FROM_HERE,
+        base::Bind(
+            base::IgnoreResult(&extensions::FeatureProvider::GetAPIFeatures)));
+  }
 #endif
 
   // Android updates the metrics service dynamically depending on whether the