Add PDF viewer example.

examples/bitmap_uploader/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.
 
 source_set("bitmap_uploader") {
   sources = [
     "bitmap_uploader.cc",
     "bitmap_uploader.h",
   ]
 
   public_deps = [
     "//base",
     "//mojo/public/c/gles2",
+    "//mojo/public/gles2:for_shared_library",
     "//mojo/services/public/interfaces/gpu",
     "//mojo/services/public/interfaces/surfaces",
   ]
   deps = [
     "//mojo/application",
     "//mojo/public/cpp/bindings:bindings",
     "//mojo/public/gles2:for_shared_library",
     "//mojo/public/interfaces/application",
     "//mojo/services/public/cpp/surfaces",
     "//mojo/services/public/cpp/view_manager",
     "//mojo/services/public/interfaces/geometry",
     "//mojo/services/public/interfaces/input_events:input_events",
     "//mojo/services/public/interfaces/surfaces:surface_id",
     "//mojo/services/public/interfaces/view_manager",
     "//mojo/services/public/interfaces/window_manager2",
   ]
 }