FasterLocationReload: Add a field trial flag to enable the feature

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index b46ee3212a83a979b15e71081f5a409172e7bd99..9e01f6f97c01a13b3dad443b176be17f7dcbe0bb 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -61,6 +61,11 @@ const base::Feature kDocumentWriteEvaluator{"DocumentWriteEvaluator",
 const base::Feature kExpensiveBackgroundTimerThrottling{
     "ExpensiveBackgroundTimerThrottling", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enables faster location.reload() to use a reload mode that revalidates only
+// main resource forcibly. https://crbug.com/670237.
+const base::Feature kFasterLocationReload{"FasterLocationReload",
+                                          base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Enables the Feature Policy framework for granting and removing access to
 // other features through HTTP headers.
 const base::Feature kFeaturePolicy{"FeaturePolicy",