Pure pedantry: Replace all ".size() == 0" with ".empty()".

content/browser/renderer_host/render_sandbox_host_linux.cc

 // 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.
 
 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 
 #include <fcntl.h>
 #include <fontconfig/fontconfig.h>
 #include <stdint.h>
 #include <unistd.h>
@@ skipping 102 matching lines @@
     // error for a maximum length message.
     char buf[FontConfigInterface::kMaxFontFamilyLength + 128];
 
     const ssize_t len = UnixDomainSocket::RecvMsg(fd, buf, sizeof(buf), &fds);
     if (len == -1) {
       // TODO: should send an error reply, or the sender might block forever.
       NOTREACHED()
           << "Sandbox host message is larger than kMaxFontFamilyLength";
       return;
     }
-    if (fds.size() == 0)
+    if (fds.empty())
       return;
 
     Pickle pickle(buf, len);
     void* iter = NULL;
 
     int kind;
     if (!pickle.ReadInt(&iter, &kind))
       goto error;
 
     if (kind == FontConfigIPC::METHOD_MATCH) {
@@ skipping 544 matching lines @@
 }
 
 RenderSandboxHostLinux::~RenderSandboxHostLinux() {
   if (initialized_) {
     if (HANDLE_EINTR(close(renderer_socket_)) < 0)
       PLOG(ERROR) << "close";
     if (HANDLE_EINTR(close(childs_lifeline_fd_)) < 0)
       PLOG(ERROR) << "close";
   }
 }