Update from chromium https://crrev.com/301725/

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.
 
 source_set("client") {
   sources = [
     "cmd_buffer_helper.cc",
     "cmd_buffer_helper.h",
     "fenced_allocator.cc",
     "fenced_allocator.h",
@@ skipping 86 matching lines @@
 # in. Useful when a target uses the interface, but permits its users to choose
 # an implementation.
 source_set("gles2_interface") {
   sources = [ "gles2_interface.h" ]
   public_configs = [ "//third_party/khronos:khronos_headers" ]
   deps = [
     "//base",
   ]
 }
 
+source_set("gpu_memory_buffer_manager") {
+  sources = [
+    "gpu_memory_buffer_manager.cc",
+    "gpu_memory_buffer_manager.h",
+  ]
+  deps = [
+    "//ui/gfx",
+  ]
+}
+
 # Library emulates GLES2 using command_buffers.
 component("gles2_implementation") {
   sources = gles2_implementation_source_files
 
   defines = [ "GLES2_IMPL_IMPLEMENTATION" ]
   all_dependent_configs = [ "//third_party/khronos:khronos_headers" ]
 
   if (is_win) {
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     cflags = [ "/wd4267" ]  # size_t to int truncation.
@@ skipping 37 matching lines @@
   sources = [
     "gl_in_process_context.h",
     "gl_in_process_context.cc",
     "gl_in_process_context_export.h",
   ]
 
   defines = [ "GL_IN_PROCESS_CONTEXT_IMPLEMENTATION" ]
 
   deps = [
     ":gles2_implementation",
+    ":gpu_memory_buffer_manager",
     "//gpu",
     "//gpu/command_buffer/common:gles2_utils",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }
 
 component("gles2_c_lib") {
   sources = gles2_c_lib_source_files
   defines = [ "GLES2_C_LIB_IMPLEMENTATION" ]
 
   if (is_win) {
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     cflags = [ "/wd4267" ]  # size_t to int truncation.
   }
 
   deps = [
     ":client",
     ":gles2_interface",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//gpu/command_buffer/common",
   ]
 }