gpu/khronos_glcts_support: Move target_defaults into separate file

gpu/khronos_glcts_support/khronos_glcts.gypi

 # Copyright 2014 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.
 
 {
-  'target_defaults': {
-    'defines': [
-      'DEQP_TARGET_NAME="chrome-gpu-command-buffer"',
-      'DEQP_SUPPORT_GLES2=1',
-      'DEQP_SUPPORT_EGL=1',
-      'GTF_API=GTF_GLES20',
-    ],
-    'conditions': [
-      ['OS=="linux"', {
-        'defines': [
-          '_XOPEN_SOURCE=500',
-        ],
-        'cflags!': [
-          '-fno-exceptions',
-        ],
-        'cflags_cc!': [
-          '-fno-exceptions',
-        ],
-        'target_conditions': [
-          ['_type=="static_library"', {
-            'cflags_cc!': [
-              '-fno-rtti',
-            ],
-          }],
-        ],
-      }],
-    ],
-  },
   'variables': {
 
     # WA: Suppress [chromium-style] enforcement errors when compiled with
     # clang.  The third_party/khronos_glcts sourcecode does not comply with
     # the chromium-style standards.
     'clang_use_chrome_plugins': 0,
 
     'glcts_data_dirs': [
       '<(DEPTH)/third_party/khronos_glcts/cts/data',
     ],
@@ skipping 465 matching lines @@
       '<(DEPTH)/third_party/khronos_glcts/framework/delibs/decpp/deStringUtil.hpp',
       '<(DEPTH)/third_party/khronos_glcts/framework/delibs/decpp/deThread.cpp',
       '<(DEPTH)/third_party/khronos_glcts/framework/delibs/decpp/deThread.hpp',
       '<(DEPTH)/third_party/khronos_glcts/framework/delibs/decpp/deThreadSafeRingBuffer.cpp',
       '<(DEPTH)/third_party/khronos_glcts/framework/delibs/decpp/deThreadSafeRingBuffer.hpp',
       '<(DEPTH)/third_party/khronos_glcts/framework/delibs/decpp/deUniquePtr.cpp',
       '<(DEPTH)/third_party/khronos_glcts/framework/delibs/decpp/deUniquePtr.hpp',
     ],
   }
 }