Revert 239759 "The comment in base64.h implies that base::Base64..."

trunk/src/chrome/browser/extensions/api/proxy/proxy_api_helpers.cc

 // Copyright (c) 2012 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.
 
 // Implementation of helper functions for the Chrome Extensions Proxy Settings
 // API.
 //
 // Throughout this code, we report errors to the user by setting an |error|
 // parameter, if and only if these errors can be cause by invalid input
 // from the extension and we cannot expect that the extensions API has
@@ skipping 17 matching lines @@
 namespace extensions {
 
 namespace keys = proxy_api_constants;
 
 namespace proxy_api_helpers {
 
 bool CreateDataURLFromPACScript(const std::string& pac_script,
                                 std::string* pac_script_url_base64_encoded) {
   // Encode pac_script in base64.
   std::string pac_script_base64_encoded;
-  base::Base64Encode(pac_script, &pac_script_base64_encoded);
+  if (!base::Base64Encode(pac_script, &pac_script_base64_encoded))
+    return false;
 
   // Make it a correct data url.
   *pac_script_url_base64_encoded =
       std::string(keys::kPACDataUrlPrefix) + pac_script_base64_encoded;
   return true;
 }
 
 bool CreatePACScriptFromDataURL(
     const std::string& pac_script_url_base64_encoded,
     std::string* pac_script) {
@@ skipping 439 matching lines @@
                                 const std::string& delims) {
   base::ListValue* out = new base::ListValue;
   base::StringTokenizer entries(in, delims);
   while (entries.GetNext())
     out->Append(new base::StringValue(entries.token()));
   return out;
 }
 
 }  // namespace proxy_api_helpers
 }  // namespace extensions