Revert 124702 - GPU: Buld most of the gpu as a single DLL.

gpu/gles2_implementation.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.
 
 {
   # Library emulates GLES2 using command_buffers.
   'dependencies': [
     '../base/base.gyp:base',
     '../ui/gfx/gl/gl.gyp:gl',
   ],
   'all_dependent_settings': {
     'include_dirs': [
       # For GLES2/gl2.h
       '<(DEPTH)/third_party/khronos',
     ],
   },
   'sources': [
     '<@(gles2_implementation_source_files)',
   ],
 }