Coverity: Initialize member variables.

base/dir_reader_linux.h

 // Copyright (c) 2010 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.
 
 #ifndef BASE_DIR_READER_LINUX_H_
 #define BASE_DIR_READER_LINUX_H_
 #pragma once
 
 #include <errno.h>
 #include <fcntl.h>
@@ skipping 15 matching lines @@
   unsigned char   d_type;
   char            d_name[0];
 };
 
 class DirReaderLinux {
  public:
   explicit DirReaderLinux(const char* directory_path)
       : fd_(open(directory_path, O_RDONLY | O_DIRECTORY)),
         offset_(0),
         size_(0) {
+    memset(buf_, 0, sizeof(buf_));
   }
 
   ~DirReaderLinux() {
     if (fd_ >= 0) {
       if (HANDLE_EINTR(close(fd_)))
         RAW_LOG(ERROR, "Failed to close directory handle");
     }
   }
 
   bool IsValid() const {
@@ skipping 43 matching lines @@
   const int fd_;
   unsigned char buf_[512];
   size_t offset_, size_;
 
   DISALLOW_COPY_AND_ASSIGN(DirReaderLinux);
 };
 
 }  // namespace base
 
 #endif // BASE_DIR_READER_LINUX_H_