Change some link tricks for safe_browsing_tests on Mac to make it run.

chrome/chrome_tests.gypi

 # Copyright (c) 2010 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.
 
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_dll_resource.h',
       'common/pref_names.cc',
       'common/pref_names.h',
@@ skipping 2181 matching lines @@
           'configurations': {
             'Debug_Base': {
               'msvs_settings': {
                 'VCLinkerTool': {
                   'LinkIncremental': '<(msvs_large_module_debug_link_mode)',
                 },
               },
             },
           },
         }],
+        ['OS=="mac"', {
+          # See crbug.com/43791 - libwebcore.a is too large to mmap on Mac.
+          'dependencies+++': [
+            '../third_party/WebKit/WebCore/WebCore.gyp/WebCore.gyp:webcore',
+          ],
+          # These flags are needed to run the test on Mac.
+          # Search for comments about "xcode_settings" elsewhere in this file.
+          'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
+        }],
       ],
     },  # target safe_browsing_tests
     {
       'target_name': 'startup_tests',
       'type': 'executable',
       'msvs_guid': 'D3E6C0FD-54C7-4FF2-9AE1-72F2DAFD820C',
       'dependencies': [
         'chrome',
         'browser',
         'common',
@@ skipping 1008 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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