Remove som GYP annotations, remove unused manifest.

gpu/command_buffer/client/BUILD.gn

 # Copyright (c) 2013 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.
 
 # The files here go into the "gpu" component in a component build (with
 # "command_buffer_client" and "gles2_cmd_helper" just forwarding) and goes into
-# separate static libraries in non-component build. This needs to match the
-# GYP build which was likely an attempt to make larger components to help with
-# loading.
+# separate static libraries in non-component build.
 group("client") {
   if (is_component_build) {
     public_deps = [
       "//gpu",
     ]
   } else {
     public_deps = [
       ":client_sources",
     ]
   }
@@ skipping 196 matching lines @@
 
   deps = [
     ":client",
     ":gles2_interface",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//gpu/command_buffer/common",
   ]
 }
 
-# GYP version: gpu/gpu.gyp:gles2_c_lib_nocheck
 # Same as gles2_c_lib except with no parameter checking. Required for
 # OpenGL ES 2.0 conformance tests.
 component("gles2_c_lib_nocheck") {
   sources = gles2_c_lib_source_files
 
   defines = [
     "GLES2_C_LIB_IMPLEMENTATION",
     "GLES2_CONFORMANCE_TESTS=1",
   ]
   deps = [
     ":client",
     ":gles2_implementation_no_check",
     ":gles2_interface",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//gpu/command_buffer/common",
   ]
 }