Make the name of the event source for SYSLOG configurable.

chrome/install_static/product_install_details_unittest.cc

 // Copyright 2016 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.
 
 #include "chrome/install_static/product_install_details.h"
 
 #include "base/base_paths.h"
 #include "base/files/file_path.h"
 #include "base/i18n/case_conversion.h"
 #include "base/macros.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/test_reg_util_win.h"
 #include "base/win/registry.h"
 #include "base/win/windows_version.h"
 #include "chrome/install_static/install_constants.h"
+#include "chrome/install_static/install_details.h"
 #include "chrome/install_static/install_modes.h"
 #include "chrome_elf/nt_registry/nt_registry.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::Eq;
 using ::testing::StrEq;
 
 namespace install_static {
 
@@ skipping 318 matching lines @@
       EXPECT_THAT(details->channel(), StrEq(test_data().channel));
     }
   }
 }
 
 INSTANTIATE_TEST_CASE_P(All,
                         MakeProductDetailsTest,
                         testing::ValuesIn(kTestData));
 
 }  // namespace install_static