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

components/crash/content/app/crash_keys_win_unittest.cc

 // Copyright 2014 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 "components/crash/content/app/crash_keys_win.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/strings/stringprintf.h"
 #include "breakpad/src/client/windows/common/ipc_protocol.h"
@@ skipping 111 matching lines @@
                                L"temporary",
                                &cmd_line,
                                &crash_client_);
 
   ASSERT_TRUE(info != NULL);
   ASSERT_TRUE(info->entries != NULL);
 
   // We expect 7 fixed keys and a "freeboard" of 256 keys for dynamic entries.
   EXPECT_EQ(256U + 7U, info->count);
 
-  EXPECT_EQ(1, CountKeyValueOccurences(info, L"ver", L"1.2.3.4"));
-  EXPECT_EQ(1, CountKeyValueOccurences(info, L"prod", L"SomeProdName"));
-  EXPECT_EQ(1, CountKeyValueOccurences(info, L"plat", L"Win32"));
-  EXPECT_EQ(1, CountKeyValueOccurences(info, L"ptype", L"made_up_type"));
+  EXPECT_EQ(1u, CountKeyValueOccurences(info, L"ver", L"1.2.3.4"));
+  EXPECT_EQ(1u, CountKeyValueOccurences(info, L"prod", L"SomeProdName"));
+  EXPECT_EQ(1u, CountKeyValueOccurences(info, L"plat", L"Win32"));
+  EXPECT_EQ(1u, CountKeyValueOccurences(info, L"ptype", L"made_up_type"));
   std::wstring pid_str(base::StringPrintf(L"%d", ::GetCurrentProcessId()));
-  EXPECT_EQ(1, CountKeyValueOccurences(info, L"pid", pid_str.c_str()));
-  EXPECT_EQ(1, CountKeyValueOccurences(info, L"channel", L"-devm"));
-  EXPECT_EQ(1, CountKeyValueOccurences(info, L"profile-type", L"temporary"));
-  EXPECT_EQ(256, CountKeyValueOccurences(info, L"unspecified-crash-key", L""));
+  EXPECT_EQ(1u, CountKeyValueOccurences(info, L"pid", pid_str.c_str()));
+  EXPECT_EQ(1u, CountKeyValueOccurences(info, L"channel", L"-devm"));
+  EXPECT_EQ(1u, CountKeyValueOccurences(info, L"profile-type", L"temporary"));
+  EXPECT_EQ(256u, CountKeyValueOccurences(info, L"unspecified-crash-key", L""));
 }
 
 }  // namespace breakpad