Add a runtime flag for interactive autocomplete

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 62f32eb5fca83e02ef4cb12f8c5d90a749464049..da042e5d58d66a709f322e9117d40183f502b227 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -488,6 +488,11 @@ const char kEnableDevToolsExperiments[]     = "enable-devtools-experiments";
 // Enables Drive v2 API instead of Google Documents List API.
 const char kEnableDriveV2Api[]              = "enable-drive-v2-api";
 
+// Enables an interactive autocomplete UI and a way to invoke this UI from
+// WebKit by enabling HTMLFormElement#requestAutocomplete (and associated
+// autocomplete* events and logic).
+const char kEnableInteractiveAutocomplete[] = "enable-interactive-autocomplete";
+
 // Enables extensions to be easily installed from sites other than the web
 // store. Without this flag, they can still be installed, but must be manually
 // dragged onto chrome://extensions/.