Clang: enable -Wbool-conversions and -Wunused-variables on Linux.

chrome/renderer/spellchecker/spellcheck_unittest.cc

 // Copyright (c) 2006-2008 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 "webkit/glue/webkit_glue.h"
 
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/platform_file.h"
@@ skipping 645 matching lines @@
 
     int misspelling_start = 0;
     int misspelling_length = 0;
     bool result = spell_check()->SpellCheckWord(
         WideToUTF16(kTestCases[i].input).c_str(),
         static_cast<int>(input_length),
         0,
         &misspelling_start,
         &misspelling_length, NULL);
 
-    EXPECT_EQ(true, result) << kTestCases[i].language;
+    EXPECT_TRUE(result) << kTestCases[i].language;
     EXPECT_EQ(0, misspelling_start);
     EXPECT_EQ(0, misspelling_length);
   }
 }
 
 TEST_F(SpellCheckTest, GetAutoCorrectionWord_EN_US) {
   static const struct {
     // A misspelled word.
     const char* input;
 
@@ skipping 15 matching lines @@
         UTF8ToUTF16(kTestCases[i].expected_result));
     string16 autocorrect_word = spell_check()->GetAutoCorrectionWord(
         misspelled_word, 0);
 
     // Check for spelling.
     EXPECT_EQ(expected_autocorrect_word, autocorrect_word);
   }
 }
 
 }  // namespace