Move shell interfaces into the shell.mojom namespace.

components/html_viewer/html_viewer.h

Index: components/html_viewer/html_viewer.h
diff --git a/components/html_viewer/html_viewer.h b/components/html_viewer/html_viewer.h
index 0382196239804d5c5a10a3524ec0896cc7c85274..6543bf374424280a5b5092d8ae0a7c15d9ef1c99 100644
--- a/components/html_viewer/html_viewer.h
+++ b/components/html_viewer/html_viewer.h
@@ -15,8 +15,9 @@ namespace html_viewer {
 
 class GlobalState;
 
-class HTMLViewer : public mojo::ApplicationDelegate,
-                   public mojo::InterfaceFactory<mojo::ContentHandler> {
+class HTMLViewer
+    : public mojo::ApplicationDelegate,
+      public mojo::InterfaceFactory<mojo::shell::mojom::ContentHandler> {
  public:
   HTMLViewer();
   ~HTMLViewer() override;
@@ -33,9 +34,10 @@ class HTMLViewer : public mojo::ApplicationDelegate,
   bool AcceptConnection(
       mojo::ApplicationConnection* connection) override;
 
-  // Overridden from InterfaceFactory<ContentHandler>
+  // Overridden from InterfaceFactory<shell::mojom::ContentHandler>
   void Create(mojo::ApplicationConnection* connection,
-              mojo::InterfaceRequest<mojo::ContentHandler> request) override;
+              mojo::InterfaceRequest<mojo::shell::mojom::ContentHandler>
+                  request) override;
 
   scoped_ptr<GlobalState> global_state_;
   mojo::ApplicationImpl* app_;