Turn on warnings as errors for (most) third_party code on Windows

third_party/leveldatabase/env_chromium.cc

 // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file. See the AUTHORS file for names of contributors.
 
 #include <deque>
 #include <errno.h>
 #include <stdio.h>
 #include "base/at_exit.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 234 matching lines @@
 
 class ChromiumFileLock : public FileLock {
  public:
   ::base::PlatformFile file_;
 };
 
 class ChromiumEnv : public Env {
  public:
   ChromiumEnv();
   virtual ~ChromiumEnv() {
-    fprintf(stderr, "Destroying Env::Default()\n");
-    exit(1);
+    NOTREACHED();
   }
 
   virtual Status NewSequentialFile(const std::string& fname,
                                    SequentialFile** result) {
     FILE* f = fopen_internal(fname.c_str(), "rb");
     if (f == NULL) {
       *result = NULL;
       return Status::IOError(fname, strerror(errno));
     } else {
       *result = new ChromiumSequentialFile(fname, f);
@@ skipping 280 matching lines @@
 ::base::LazyInstance<ChromiumEnv>::Leaky
     default_env = LAZY_INSTANCE_INITIALIZER;
 
 }
 
 Env* Env::Default() {
   return default_env.Pointer();
 }
 
 }