Add support for using DOM Distiller in incognito.

chrome/browser/dom_distiller/profile_utils.cc

Index: chrome/browser/dom_distiller/profile_utils.cc
diff --git a/chrome/browser/dom_distiller/profile_utils.cc b/chrome/browser/dom_distiller/profile_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..95644383fab645847ae6867b5bbd619bf90635ea
--- /dev/null
+++ b/chrome/browser/dom_distiller/profile_utils.cc
@@ -0,0 +1,29 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/dom_distiller/profile_utils.h"
+
+#include "base/command_line.h"
+#include "chrome/browser/dom_distiller/dom_distiller_service_factory.h"
+#include "chrome/browser/dom_distiller/lazy_dom_distiller_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_switches.h"
+#include "components/dom_distiller/content/dom_distiller_viewer_source.h"
+#include "components/dom_distiller/core/url_constants.h"
+
+void RegisterDomDistillerViewerSource(Profile* profile) {
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kEnableDomDistiller)) {
+    dom_distiller::DomDistillerServiceFactory* dom_distiller_service_factory =
+        dom_distiller::DomDistillerServiceFactory::GetInstance();
+    // The LazyDomDistillerService deletes itself when the profile is destroyed.
+    dom_distiller::LazyDomDistillerService* lazy_service =
+        new dom_distiller::LazyDomDistillerService(
+            profile, dom_distiller_service_factory);
+    content::URLDataSource::Add(
+        profile,
+        new dom_distiller::DomDistillerViewerSource(
+            lazy_service, dom_distiller::kDomDistillerScheme));
+  }
+}