Move //mojo/services/X/public/... to //mojo/services/X/... (part 3).

mojo/gpu/BUILD.gn

Index: mojo/gpu/BUILD.gn
diff --git a/mojo/gpu/BUILD.gn b/mojo/gpu/BUILD.gn
index 3f2687f0ada8ee162e384f926802f8880a44f1bd..27d27234e8bcea6d76ed9bdc59da1f67ab35b732 100644
--- a/mojo/gpu/BUILD.gn
+++ b/mojo/gpu/BUILD.gn
@@ -42,9 +42,9 @@ source_set("gpu") {
     "//mojo/services/geometry/cpp",
     "//mojo/services/geometry/interfaces",
     "//mojo/services/gpu/interfaces",
-    "//mojo/services/surfaces/public/cpp",
-    "//mojo/services/surfaces/public/interfaces",
-    "//mojo/services/surfaces/public/interfaces:surface_id",
+    "//mojo/services/surfaces/cpp",
+    "//mojo/services/surfaces/interfaces",
+    "//mojo/services/surfaces/interfaces:surface_id",
   ]
 }
 
@@ -65,7 +65,7 @@ mojo_native_application("apptests") {
     "//mojo/application:test_support",
     "//mojo/public/cpp/bindings:callback",
     "//mojo/services/geometry/interfaces",
-    "//mojo/services/surfaces/public/interfaces:surface_id",
+    "//mojo/services/surfaces/interfaces:surface_id",
     "//testing/gtest",
   ]
 }