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

components/browser_watcher/exit_funnel_win_unittest.cc

Index: components/browser_watcher/exit_funnel_win_unittest.cc
diff --git a/components/browser_watcher/exit_funnel_win_unittest.cc b/components/browser_watcher/exit_funnel_win_unittest.cc
index b43b273650aae83efe090c5e8d07b52599e4c17a..d45a291bb94b367265e7b4cac4ad361d8c0cddda 100644
--- a/components/browser_watcher/exit_funnel_win_unittest.cc
+++ b/components/browser_watcher/exit_funnel_win_unittest.cc
@@ -37,7 +37,7 @@ class ExitFunnelWinTest : public testing::Test {
   base::string16 GetEventSubkey() {
     // There should be a single subkey named after this process' pid.
     base::win::RegistryKeyIterator it(HKEY_CURRENT_USER, kRegistryPath);
-    EXPECT_EQ(1, it.SubkeyCount());
+    EXPECT_EQ(1u, it.SubkeyCount());
 
     unsigned pid = 0;
     base::StringToUint(it.Name(), &pid);
@@ -53,7 +53,7 @@ class ExitFunnelWinTest : public testing::Test {
 
     base::win::RegKey key(HKEY_CURRENT_USER, key_name.c_str(), KEY_READ);
     EXPECT_TRUE(key.Valid());
-    EXPECT_EQ(2, key.GetValueCount());
+    EXPECT_EQ(2u, key.GetValueCount());
 
     EventMap events;
     for (size_t i = 0; i < key.GetValueCount(); ++i) {
@@ -86,7 +86,7 @@ TEST_F(ExitFunnelWinTest, RecordSingleEvent) {
 
   EventMap events = ReadEvents();
 
-  ASSERT_EQ(events.size(), 2);
+  ASSERT_EQ(2u, events.size());
   ASSERT_TRUE(events.find(L"One") != events.end());
   ASSERT_TRUE(events.find(L"Two") != events.end());
 }
@@ -103,7 +103,7 @@ TEST_F(ExitFunnelWinTest, RecordsEventTimes) {
   ASSERT_TRUE(funnel.RecordEvent(L"Two"));
 
   EventMap events = ReadEvents();
-  ASSERT_EQ(events.size(), 2);
+  ASSERT_EQ(2u, events.size());
 
   base::TimeDelta one = base::TimeDelta::FromInternalValue(events[L"One"]);
   base::TimeDelta two = base::TimeDelta::FromInternalValue(events[L"Two"]);