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

chrome/browser/importer/ie_importer_browsertest_win.cc

 // Copyright (c) 2013 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.
 
 // The order of these includes is important.
 #include <windows.h>
 #include <unknwn.h>
 #include <intshcut.h>
 #include <propvarutil.h>
 #include <shlguid.h>
@@ skipping 228 matching lines @@
   void ImportStarted() override {}
   void ImportItemStarted(importer::ImportItem item) override {}
   void ImportItemEnded(importer::ImportItem item) override {}
   void ImportEnded() override {
     base::MessageLoop::current()->QuitWhenIdle();
     if (importer_items_ & importer::FAVORITES) {
       EXPECT_EQ(arraysize(kIEBookmarks), bookmark_count_);
       EXPECT_EQ(arraysize(kIEFaviconGroup), favicon_count_);
     }
     if (importer_items_ & importer::HISTORY)
-      EXPECT_EQ(2, history_count_);
+      EXPECT_EQ(2u, history_count_);
     if (importer_items_ & importer::HOME_PAGE)
-      EXPECT_EQ(1, homepage_count_);
+      EXPECT_EQ(1u, homepage_count_);
     if ((importer_items_ & importer::PASSWORDS) && (ie_version_ == IE7))
-      EXPECT_EQ(1, ie7_password_count_);
+      EXPECT_EQ(1u, ie7_password_count_);
     // We need to test the IE6 password importer code.
     // https://crbug.com/257100
     // EXPECT_EQ(1, password_count_);
   }
 
   // ProfileWriter:
   bool BookmarkModelIsLoaded() const override {
     // Profile is ready for writing.
     return true;
   }
@@ skipping 81 matching lines @@
     }
 
     favicon_count_ += usage.size();
   }
 
   void AddIE7PasswordInfo(const IE7PasswordInfo& info) override {
     // This function also gets called for the IEImporter test. Ignore.
     if (ie_version_ == IE7) {
       EXPECT_EQ(L"Test1", info.url_hash);
       EXPECT_EQ(1, info.encrypted_data[0]);
-      EXPECT_EQ(4, info.encrypted_data.size());
+      EXPECT_EQ(4u, info.encrypted_data.size());
       ++ie7_password_count_;
     }
   }
 
   void AddHomepage(const GURL& homepage) override {
     EXPECT_EQ(homepage.spec(), "http://www.test.com/");
     ++homepage_count_;
   }
 
  private:
@@ skipping 280 matching lines @@
   source_profile.source_path = temp_dir_.path();
 
   host->StartImportSettings(
       source_profile,
       browser()->profile(),
       importer::HOME_PAGE,
       observer);
   base::MessageLoop::current()->Run();
 }