Add the scheme chrome-distiller:// and hook up data source.

chrome/browser/dom_distiller/dom_distiller_service_factory.cc

Index: chrome/browser/dom_distiller/dom_distiller_service_factory.cc
diff --git a/chrome/browser/dom_distiller/dom_distiller_service_factory.cc b/chrome/browser/dom_distiller/dom_distiller_service_factory.cc
index 7bc75c3e578eb930fe7717559ee30ce382d4dcc2..4d248d238d7133a866323384f7cb82f9e0b96fe7 100644
--- a/chrome/browser/dom_distiller/dom_distiller_service_factory.cc
+++ b/chrome/browser/dom_distiller/dom_distiller_service_factory.cc
@@ -5,12 +5,15 @@
 #include "chrome/browser/dom_distiller/dom_distiller_service_factory.h"
 
 #include "base/threading/sequenced_worker_pool.h"
+#include "chrome/common/url_constants.h"
 #include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
 #include "components/dom_distiller/content/distiller_page_web_contents.h"
+#include "components/dom_distiller/content/dom_distiller_viewer_source.h"
 #include "components/dom_distiller/core/distiller.h"
 #include "components/dom_distiller/core/dom_distiller_store.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/url_data_source.h"
 
 namespace dom_distiller {
 
@@ -41,6 +44,8 @@ DomDistillerServiceFactory::~DomDistillerServiceFactory() {}
 
 BrowserContextKeyedService* DomDistillerServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
+  content::URLDataSource::Add(
+      profile, new DomDistillerViewerSource(chrome::kDomDistillerScheme));
 
   scoped_refptr<base::SequencedTaskRunner> background_task_runner =
           content::BrowserThread::GetBlockingPool()->GetSequencedTaskRunner(