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

net/base/x509_certificate.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 "net/base/x509_certificate.h"
 
 #include <map>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 166 matching lines @@
 #else
 static X509Certificate::OSCertHandle CreateOSCert(base::StringPiece der_cert) {
   return X509Certificate::CreateOSCertHandleFromBytes(
       const_cast<char*>(der_cert.data()), der_cert.size());
 }
 #endif
 
 // static
 X509Certificate* X509Certificate::CreateFromDERCertChain(
     const std::vector<base::StringPiece>& der_certs) {
-  if (der_certs.size() == 0)
+  if (der_certs.empty())
     return NULL;
 
   X509Certificate::OSCertHandles intermediate_ca_certs;
   for (size_t i = 1; i < der_certs.size(); i++) {
     OSCertHandle handle = CreateOSCert(der_certs[i]);
     DCHECK(handle);
     intermediate_ca_certs.push_back(handle);
   }
 
   OSCertHandle handle = CreateOSCert(der_certs[0]);
@@ skipping 141 matching lines @@
 X509Certificate::~X509Certificate() {
   // We might not be in the cache, but it is safe to remove ourselves anyway.
   g_x509_certificate_cache.Get().Remove(this);
   if (cert_handle_)
     FreeOSCertHandle(cert_handle_);
   for (size_t i = 0; i < intermediate_ca_certs_.size(); ++i)
     FreeOSCertHandle(intermediate_ca_certs_[i]);
 }
 
 }  // namespace net