Make pull to refresh not perform regular reload (with cache revalidation)

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 5db5df63229f372c74177d542cfa72aa1f9d3a50..126a2c8d4bbfd5d455bf6bba510ab92e3ce6acff 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -388,6 +388,11 @@ const char kEnableMemoryBenchmarking[]      = "enable-memory-benchmarking";
 // Enables the network information API.
 const char kEnableNetworkInformation[]      = "enable-network-information";
 
+// Enables non-validating reload on reload-to-refresh-content (e.g. pull-
+// to-refresh).
+const char kEnableNonValidatingReloadOnRefreshContent[] =
+    "enable-non-validating-reload-on-refresh-content";
+
 // Enables partial raster. Enabling this switch also enables the use of
 // persistent gpu memory buffers.
 const char kEnablePartialRaster[] = "enable-partial-raster";