Change other usages of .size() to .empty() when applicable.

net/http/http_util.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.
 
 // The rules for parsing content-types were borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_util.h"
 
 #include <algorithm>
@@ skipping 263 matching lines @@
         range.set_suffix_length(last_byte_position);
     } else if (!range.HasFirstBytePosition()) {
       return false;
     }
 
     // Do a final check on the HttpByteRange object.
     if (!range.IsValid())
       return false;
     ranges->push_back(range);
   }
-  return ranges->size() > 0;
+  return !ranges->empty();
 }
 
 // static
 bool HttpUtil::HasHeader(const std::string& headers, const char* name) {
   size_t name_len = strlen(name);
   string::const_iterator it =
       std::search(headers.begin(),
                   headers.end(),
                   name,
                   name + name_len,
@@ skipping 573 matching lines @@
       value_is_quoted_ = true;
       // Do not store iterators into this. See declaration of unquoted_value_.
       unquoted_value_ = HttpUtil::Unquote(value_begin_, value_end_);
     }
   }
 
   return true;
 }
 
 }  // namespace net