Add flag to enable Privet storage

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 9154eda7bfec731d48877d54377e8010c353e58f..5913f97a3c7c1542ca3ee41a8d1a7ff2f6ef6444 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -712,6 +712,9 @@ const char kEnablePanels[]                  = "enable-panels";
 const char kEnablePrintPreviewRegisterPromos[] =
     "enable-print-preview-register-promos";
 
+// Enable Privet storage.
+const char kEnablePrivetStorage[]     = "enable-privet-storage";
+
 // Enables tracking of tasks in profiler for viewing via about:profiler.
 // To predominantly disable tracking (profiling), use the command line switch:
 // --enable-profiling=0