Fix the linux modules build. Comparision between signed and unsigned integer...

chrome/browser/extensions/extension.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 "chrome/browser/extensions/extension.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "net/base/net_util.h"
@@ skipping 51 matching lines @@
     "Required value 'name' is missing or invalid.";
 const char* Extension::kInvalidRunAtError =
     "Invalid value for 'content_scripts[*].run_at'.";
 const char* Extension::kInvalidVersionError =
     "Required value 'version' is missing or invalid.";
 const char* Extension::kInvalidZipHashError =
     "Required key 'zip_hash' is missing or invalid.";
 const char* Extension::kInvalidPluginsDirError =
     "Invalid value for 'plugins_dir'.";
 
-const int Extension::kIdSize = 20;  // SHA1 (160 bits) == 20 bytes
+const size_t Extension::kIdSize = 20;  // SHA1 (160 bits) == 20 bytes
 
 const std::string Extension::VersionString() const {
   return version_->GetString();
 }
 
 // static
 GURL Extension::GetResourceURL(const GURL& extension_url,
                                const std::string& relative_path) {
   DCHECK(extension_url.SchemeIs(chrome::kExtensionScheme));
   DCHECK(extension_url.path() == "/");
@@ skipping 235 matching lines @@
       script.set_path(Extension::GetResourcePath(path(), file));
       script.set_url(Extension::GetResourceURL(url(), file));
 
       content_scripts_.push_back(script);
     }
   }
 
   return true;
 }