Implement SamplerManager in the command buffer

gpu/command_buffer_service.gypi

 # Copyright (c) 2012 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.
 
 {
   'include_dirs': [
     '..',
   ],
   'all_dependent_settings': {
     'include_dirs': [
@@ skipping 84 matching lines @@
     'command_buffer/service/program_cache.cc',
     'command_buffer/service/program_cache.h',
     'command_buffer/service/path_manager.cc',
     'command_buffer/service/path_manager.h',
     'command_buffer/service/program_manager.cc',
     'command_buffer/service/program_manager.h',
     'command_buffer/service/query_manager.cc',
     'command_buffer/service/query_manager.h',
     'command_buffer/service/renderbuffer_manager.cc',
     'command_buffer/service/renderbuffer_manager.h',
+    'command_buffer/service/sampler_manager.cc',
+    'command_buffer/service/sampler_manager.h',
     'command_buffer/service/shader_manager.cc',
     'command_buffer/service/shader_manager.h',
     'command_buffer/service/shader_translator.cc',
     'command_buffer/service/shader_translator.h',
     'command_buffer/service/shader_translator_cache.cc',
     'command_buffer/service/shader_translator_cache.h',
     'command_buffer/service/stream_texture_manager_in_process_android.cc',
     'command_buffer/service/stream_texture_manager_in_process_android.h',
     'command_buffer/service/sync_point_manager.cc',
     'command_buffer/service/sync_point_manager.h',
@@ skipping 20 matching lines @@
       # Required by gles2_cmd_decoder.cc on Mac.
       'link_settings': {
         'libraries': [
           '$(SDKROOT)/System/Library/Frameworks/IOSurface.framework',
           '$(SDKROOT)/System/Library/Frameworks/OpenGL.framework',
         ],
       },
     }],
   ],
 }