Add support for displaying distilled articles.

components/dom_distiller/content/dom_distiller_viewer_source.h

Index: components/dom_distiller/content/dom_distiller_viewer_source.h
diff --git a/components/dom_distiller/content/dom_distiller_viewer_source.h b/components/dom_distiller/content/dom_distiller_viewer_source.h
index 38ff4afb1eb9c5b79ad16ea9f2ff5e76a3a26c97..b3d70f4a4ef91c14b8cf48735c7c1464334d0320 100644
--- a/components/dom_distiller/content/dom_distiller_viewer_source.h
+++ b/components/dom_distiller/content/dom_distiller_viewer_source.h
@@ -11,10 +11,12 @@
 
 namespace dom_distiller {
 
+class DomDistillerService;
+
 // Serves HTML and resources for viewing distilled articles.
 class DomDistillerViewerSource : public content::URLDataSource {
  public:
-  DomDistillerViewerSource();
+  explicit DomDistillerViewerSource(DomDistillerService* dom_distiller_service);
 
  private:
   virtual ~DomDistillerViewerSource();
@@ -27,10 +29,16 @@ class DomDistillerViewerSource : public content::URLDataSource {
       int render_view_id,
       const content::URLDataSource::GotDataCallback& callback) OVERRIDE;
   virtual std::string GetMimeType(const std::string& path) const OVERRIDE;
-  virtual bool ShouldServiceRequest(
-      const net::URLRequest* request) const OVERRIDE;
+  virtual bool ShouldServiceRequest(const net::URLRequest* request)
+      const OVERRIDE;
+  virtual void WillServiceRequest(const net::URLRequest* request,
+                                  std::string* path) const OVERRIDE;
   virtual std::string GetContentSecurityPolicyFrameSrc() const OVERRIDE;
 
+  // The service which contains all the functionality needed to interact with
+  // the list of articles.
+  DomDistillerService* dom_distiller_service_;
+
   DISALLOW_COPY_AND_ASSIGN(DomDistillerViewerSource);
 };