clang/win: Let remaining chromium_code targets build with -Wextra.

chrome/browser/safe_browsing/incident_reporting/platform_state_store_win_unittest.cc

 // Copyright 2015 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/browser/safe_browsing/incident_reporting/platform_state_store.h"
 
 #include "base/prefs/pref_notifier_impl.h"
 #include "base/prefs/testing_pref_store.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_reg_util_win.h"
@@ skipping 81 matching lines @@
   void AssertTestDataIsPresent() {
     char buffer[kTestDataSize_] = {};
     base::win::RegKey key;
     ASSERT_EQ(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, kStoreKeyName_,
                                       KEY_QUERY_VALUE | KEY_WOW64_32KEY));
     DWORD data_size = kTestDataSize_;
     DWORD data_type = REG_NONE;
     ASSERT_EQ(ERROR_SUCCESS,
               key.ReadValue(base::UTF8ToUTF16(kProfileName_).c_str(),
                             &buffer[0], &data_size, &data_type));
-    EXPECT_EQ(REG_BINARY, data_type);
+    EXPECT_EQ(static_cast<DWORD>(REG_BINARY), data_type);
     ASSERT_EQ(kTestDataSize_, data_size);
     EXPECT_EQ(std::string(&buffer[0], data_size),
               std::string(&kTestData_[0], kTestDataSize_));
   }
 
   static const char kProfileName_[];
   static const base::char16 kStoreKeyName_[];
   TestingProfile* profile_;
 
  private:
@@ skipping 58 matching lines @@
 
   std::string data;
   PlatformStateStoreLoadResult result = ReadStoreData(profile_, &data);
   EXPECT_EQ(PlatformStateStoreLoadResult::CLEARED_DATA, result);
   EXPECT_EQ(std::string(), data);
   AssertTestDataIsAbsent();
 }
 
 }  // namespace platform_state_store
 }  // namespace safe_browsing