Move mojo/public/c/gpu/* to mojo/public/c/include.

mojo/gpu/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//mojo/public/mojo_application.gni")
 
 source_set("gpu") {
   sources = [
     "gl_context.cc",
     "gl_context.h",
     "gl_texture.cc",
     "gl_texture.h",
   ]
 
   public_deps = [
-    "//mojo/public/c/gpu",
+    "//mojo/public/c:gpu",
   ]
 
   deps = [
     "//base",
+    "//mojo/public/c:gpu",
+    "//mojo/public/c:gpu_onscreen",
     "//mojo/public/c:system",
-    "//mojo/public/c/gpu",
-    "//mojo/public/c/gpu:gpu_onscreen",
     "//mojo/public/cpp/application",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/environment",
     "//mojo/public/cpp/system",
     "//mojo/public/cpp/utility",
     "//mojo/public/interfaces/application",
     "//mojo/services/geometry/cpp",
     "//mojo/services/geometry/interfaces",
     "//mojo/services/gpu/interfaces",
   ]
 }