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

components/crash/content/app/crash_keys_win_unittest.cc

Index: components/crash/content/app/crash_keys_win_unittest.cc
diff --git a/components/crash/content/app/crash_keys_win_unittest.cc b/components/crash/content/app/crash_keys_win_unittest.cc
index f1a645e32058b06f55cb8be1b7e3e3c3edf31a62..197066ff7b651eedc8ceda5d3a8ba49c65fc6311 100644
--- a/components/crash/content/app/crash_keys_win_unittest.cc
+++ b/components/crash/content/app/crash_keys_win_unittest.cc
@@ -129,15 +129,15 @@ TEST_F(CrashKeysWinTest, OfficialLikeKeys) {
   // 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