Migrate the IndexedDB backend from Blink to Chromium

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 b44c85dccf0b26255f4695444dc5aea0f6d7ed96..b2e43ac0a88a22747f4d974d117a218b33947a4d 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -536,6 +536,10 @@ const char kNoSandbox[]                     = "no-sandbox";
 // finishes.
 const char kAllowNoSandboxJob[]             = "allow-no-sandbox-job";
 
+// Use the new IndexedDB backend implemented in Chromium. By default,
+// the old backend implemented in Blink is used.
+const char kNewIndexedDB[]                  = "new-indexeddb";
+
 // Specifies a command that should be used to launch the plugin process.  Useful
 // for running the plugin process through purify or quantify.  Ex:
 //   --plugin-launcher="path\to\purify /Run=yes"