Add more components to "gn check", work on dom_distiller.

components/nacl/BUILD.gn

Index: components/nacl/BUILD.gn
diff --git a/components/nacl/BUILD.gn b/components/nacl/BUILD.gn
index 3c34d4d0f4e0fd9947b78a19bd78308d8b82ec40..b888377a5c1147680b242364633cc34a40f56d5d 100644
--- a/components/nacl/BUILD.gn
+++ b/components/nacl/BUILD.gn
@@ -177,6 +177,7 @@ if (enable_nacl) {
       ":nacl",
       "//base/test:test_support",
       "//ipc:test_support",
+      "//ppapi/c",
       "//testing/gtest",
     ]
   }