Initial WebUI for DOM Distiller.

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 4500f759fc0ea019314b9a96d5d6dd49883a072c..0c074890df4fabcfcd491efd3d9d60444ff160b7 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -573,6 +573,9 @@ const char kEnableDevToolsExperiments[]     = "enable-devtools-experiments";
 // opt in to "Use web service to resolve navigation errors".)
 const char kEnableDnsProbes[]               = "enable-dns-probes";
 
+// Enables the DOM distiller.
+const char kEnableDomDistiller[]               = "enable-dom-distiller";
+
 // 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/.