Revert 271721 "VS2013 Update 2"

trunk/src/chrome/chrome_tests_unit.gypi

 # Copyright 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 2406 matching lines @@
                   'LinkIncremental': '<(msvs_debug_link_nonincremental)',
                 },
               },
             },
           },
         }],
         ['OS=="win"', {
           'dependencies': [
             'chrome_version_resources',
             'installer_util_strings',
+            'unit_tests_exe_pdb_workaround',
             '../third_party/iaccessible2/iaccessible2.gyp:iaccessible2',
             '../third_party/isimpledom/isimpledom.gyp:isimpledom',
           ],
           'conditions': [
             ['win_use_allocator_shim==1', {
               'dependencies': [
                 '<(allocator_target)',
               ],
             }],
           ],
@@ skipping 377 matching lines @@
           'includes': [
             '../build/isolate.gypi',
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
+    ['OS=="win"', {
+      'targets' : [
+        {
+          # This target is only depended upon on Windows.
+          'target_name': 'unit_tests_exe_pdb_workaround',
+          'type': 'static_library',
+          'sources': [ 'empty_pdb_workaround.cc' ],
+          'msvs_settings': {
+            'VCCLCompilerTool': {
+              # This *in the compile phase* must match the pdb name that's
+              # output by the final link. See empty_pdb_workaround.cc for
+              # more details.
+              'DebugInformationFormat': '3',
+              'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
+            },
+          },
+        },
+      ],
+    }],
   ],  # 'conditions'
 }