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

ui/base/dragdrop/os_exchange_data_win_unittest.cc

 // Copyright (c) 2012 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 "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/scoped_hglobal.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/clipboard/clipboard.h"
@@ skipping 175 matching lines @@
                                                 enumerator.Receive()));
 
   // Test that we can get one item.
   {
     // Explictly don't reset the first time, to verify the creation state is
     // OK.
     ULONG retrieved = 0;
     FORMATETC elements_array[1];
     EXPECT_EQ(S_OK, enumerator->Next(1,
         reinterpret_cast<FORMATETC*>(&elements_array), &retrieved));
-    EXPECT_EQ(1, retrieved);
+    EXPECT_EQ(1u, retrieved);
     EXPECT_EQ(text_x_moz_url, elements_array[0].cfFormat);
   }
 
   // Test that we can get one item with a NULL retrieved value.
   {
     EXPECT_EQ(S_OK, enumerator->Reset());
     FORMATETC elements_array[1];
     EXPECT_EQ(S_OK, enumerator->Next(1,
         reinterpret_cast<FORMATETC*>(&elements_array), NULL));
     EXPECT_EQ(text_x_moz_url, elements_array[0].cfFormat);
   }
 
   // Test that we can get two items.
   {
     EXPECT_EQ(S_OK, enumerator->Reset());
     ULONG retrieved = 0;
     FORMATETC elements_array[2];
     EXPECT_EQ(S_OK, enumerator->Next(2,
         reinterpret_cast<FORMATETC*>(&elements_array), &retrieved));
-    EXPECT_EQ(2, retrieved);
+    EXPECT_EQ(2u, retrieved);
     EXPECT_EQ(text_x_moz_url, elements_array[0].cfFormat);
     EXPECT_EQ(cfstr_file_group_descriptor, elements_array[1].cfFormat);
   }
 
   // Test that we can skip the first item.
   {
     EXPECT_EQ(S_OK, enumerator->Reset());
     EXPECT_EQ(S_OK, enumerator->Skip(1));
     ULONG retrieved = 0;
     FORMATETC elements_array[1];
     EXPECT_EQ(S_OK, enumerator->Next(1,
         reinterpret_cast<FORMATETC*>(&elements_array), &retrieved));
-    EXPECT_EQ(1, retrieved);
+    EXPECT_EQ(1u, retrieved);
     EXPECT_EQ(cfstr_file_group_descriptor, elements_array[0].cfFormat);
   }
 
   // Test that we can skip the first item, and create a clone that matches in
   // this state, and modify the original without affecting the clone.
   {
     EXPECT_EQ(S_OK, enumerator->Reset());
     EXPECT_EQ(S_OK, enumerator->Skip(1));
     base::win::ScopedComPtr<IEnumFORMATETC> cloned_enumerator;
     EXPECT_EQ(S_OK, enumerator.get()->Clone(cloned_enumerator.Receive()));
     EXPECT_EQ(S_OK, enumerator.get()->Reset());
 
     {
       ULONG retrieved = 0;
       FORMATETC elements_array[1];
       EXPECT_EQ(S_OK, cloned_enumerator->Next(1,
           reinterpret_cast<FORMATETC*>(&elements_array), &retrieved));
-      EXPECT_EQ(1, retrieved);
+      EXPECT_EQ(1u, retrieved);
       EXPECT_EQ(cfstr_file_group_descriptor, elements_array[0].cfFormat);
     }
 
     {
       ULONG retrieved = 0;
       FORMATETC elements_array[1];
       EXPECT_EQ(S_OK, enumerator->Next(1,
           reinterpret_cast<FORMATETC*>(&elements_array), &retrieved));
-      EXPECT_EQ(1, retrieved);
+      EXPECT_EQ(1u, retrieved);
       EXPECT_EQ(text_x_moz_url, elements_array[0].cfFormat);
     }
   }
 }
 
 TEST(OSExchangeDataWinTest, TestURLExchangeFormatsViaCOM) {
   OSExchangeData data;
   std::string url_spec = "http://www.google.com/";
   GURL url(url_spec);
   std::wstring url_title = L"www.google.com";
@@ skipping 75 matching lines @@
   OSExchangeData data2(data.provider().Clone());
   ASSERT_TRUE(data2.HasURL(OSExchangeData::CONVERT_FILENAMES));
   GURL read_url;
   std::wstring title;
   EXPECT_TRUE(data2.GetURLAndTitle(
       OSExchangeData::CONVERT_FILENAMES, &read_url, &title));
   EXPECT_EQ(GURL("http://google.com"), read_url);
 }
 
 }  // namespace ui