Revert of pepper: parse context creation attrib list on the plugin side

gpu/ipc/common/BUILD.gn

 # Copyright 2016 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("//build/config/ui.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 group("common") {
   if (is_component_build) {
     public_deps = [
@@ skipping 35 matching lines @@
     "//third_party/khronos:khronos_headers",
   ]
 
   public_deps = [
     "//gpu/command_buffer/common:common_sources",
     "//ipc",
   ]
 
   deps = [
     "//base",
-    "//gpu/command_buffer/common:gles2_utils",
     "//ui/gfx/ipc",
     "//ui/gfx/ipc/geometry",
   ]
 }
 
 source_set("ipc_common_sources") {
   # External code should depend on this via //gpu/ipc/common above rather than
   # depending on this directly or the component build will break.
   visibility = [ "//gpu/*" ]
 
@@ skipping 63 matching lines @@
 mojom("test_interfaces") {
   testonly = true
   sources = [
     "traits_test_service.mojom",
   ]
 
   public_deps = [
     ":interfaces",
   ]
 }