Move shell interfaces into the shell.mojom namespace.

components/font_service/public/cpp/font_loader.h

Index: components/font_service/public/cpp/font_loader.h
diff --git a/components/font_service/public/cpp/font_loader.h b/components/font_service/public/cpp/font_loader.h
index 0a4186198f879d999a9acd0b01dfc3456d86c4d0..b9fbd6fab9d78f5980215729b558bda0c1448f94 100644
--- a/components/font_service/public/cpp/font_loader.h
+++ b/components/font_service/public/cpp/font_loader.h
@@ -19,8 +19,12 @@
 
 namespace mojo {
 class ApplicationImpl;
+namespace shell {
+namespace mojom {
 class Shell;
 }
+}
+}
 
 namespace font_service {
 namespace internal {
@@ -36,7 +40,7 @@ class FontServiceThread;
 class FontLoader : public SkFontConfigInterface,
                    public internal::MappedFontFile::Observer {
  public:
-  explicit FontLoader(mojo::Shell* shell);
+  explicit FontLoader(mojo::shell::mojom::Shell* shell);
   explicit FontLoader(mojo::ApplicationImpl* application_impl);
   ~FontLoader() override;