Fix and enable lint checks.

core/src/fxcrt/fx_system_unittest.cpp

 // Copyright 2015 PDFium 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 <string>
 
 #include "core/include/fxcrt/fx_system.h"
 #include "testing/fx_string_testhelpers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 109 matching lines @@
   EXPECT_EQ(std::string(""), buf);
 
   FXSYS_i64toa(42, buf, 1);
   EXPECT_EQ(std::string(""), buf);
 
   FXSYS_i64toa(42, buf, 0);
   EXPECT_EQ(std::string(""), buf);
 
   FXSYS_i64toa(42, buf, -1);
   EXPECT_EQ(std::string(""), buf);
-};
+}
 
 TEST(fxcrt, FXSYS_i64toa) {
   Check64BitBase16Itoa(std::numeric_limits<int64_t>::min(),
                        "-8000000000000000");
   Check64BitBase10Itoa(std::numeric_limits<int64_t>::min(),
                        "-9223372036854775808");
   Check64BitBase2Itoa(
       std::numeric_limits<int64_t>::min(),
       "-1000000000000000000000000000000000000000000000000000000000000000");
 
@@ skipping 11 matching lines @@
 
   Check64BitBase16Itoa(std::numeric_limits<int64_t>::max(), "7fffffffffffffff");
   Check64BitBase10Itoa(std::numeric_limits<int64_t>::max(),
                        "9223372036854775807");
   Check64BitBase2Itoa(
       std::numeric_limits<int64_t>::max(),
       "111111111111111111111111111111111111111111111111111111111111111");
 }
 
 #endif  // _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_