Get content_browsertest working. I've added a simple test for now, and will convert the tests in sr…

chrome/test/gpu/test_support_gpu.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.
 
 # This file is meant to be included into targets which run gpu tests.
 {
   'variables': {
      'test_list_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome/test/gpu',
      'src_dir': '../../..',
   },
   'dependencies': [
     'browser',
     'chrome',
     'chrome_resources.gyp:chrome_resources',
     'chrome_resources.gyp:chrome_strings',
     'renderer',
     'test_support_common',
     'test_support_ui',
     '<(src_dir)/base/base.gyp:base',
     '<(src_dir)/base/base.gyp:test_support_base',
     '<(src_dir)/net/net.gyp:net_test_support',
     '<(src_dir)/skia/skia.gyp:skia',
     '<(src_dir)/testing/gtest.gyp:gtest',
     '<(src_dir)/third_party/icu/icu.gyp:icui18n',
     '<(src_dir)/third_party/icu/icu.gyp:icuuc',
   ],
   'defines': [
     'HAS_OUT_OF_PROC_TEST_RUNNER',
-    'BROWSER_TESTS_HEADER_OVERRIDE="chrome/test/base/in_process_browser_test.h"',
   ],
   'include_dirs': [
     '<(src_dir)',
     '<(test_list_out_dir)',
   ],
   'sources': [
     '<(src_dir)/chrome/test/base/chrome_test_launcher.cc',
   ],
   # hard_dependency is necessary for this target because it has actions
   # that generate a header file included by dependent targets. The header
@@ skipping 55 matching lines @@
         '<(src_dir)/build/linux/system.gyp:ssl',
       ],
     }],
     ['toolkit_views==1', {
       'dependencies': [
        '<(src_dir)/ui/views/views.gyp:views',
       ],
     }],
   ],
 }