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

trunk/src/content/shell/renderer/webkit_test_runner.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.
 
 #include "content/shell/renderer/webkit_test_runner.h"
 
 #include <algorithm>
 #include <clocale>
 #include <cmath>
 
@@ skipping 274 matching lines @@
 WebURL WebKitTestRunner::localFileToDataURL(const WebURL& file_url) {
   base::FilePath local_path;
   if (!net::FileURLToFilePath(file_url, &local_path))
     return WebURL();
 
   std::string contents;
   Send(new ShellViewHostMsg_ReadFileToString(
         routing_id(), local_path, &contents));
 
   std::string contents_base64;
-  base::Base64Encode(contents, &contents_base64);
+  if (!base::Base64Encode(contents, &contents_base64))
+    return WebURL();
 
   const char data_url_prefix[] = "data:text/css:charset=utf-8;base64,";
   return WebURL(GURL(data_url_prefix + contents_base64));
 }
 
 WebURL WebKitTestRunner::rewriteLayoutTestsURL(const std::string& utf8_url) {
   const char kPrefix[] = "file:///tmp/LayoutTests/";
   const int kPrefixLen = arraysize(kPrefix) - 1;
 
   if (utf8_url.compare(0, kPrefixLen, kPrefix, kPrefixLen))
@@ skipping 388 matching lines @@
       WebURLRequest(GURL(kAboutBlankURL)));
   Send(new ShellViewHostMsg_ResetDone(routing_id()));
 }
 
 void WebKitTestRunner::OnNotifyDone() {
   render_view()->GetWebView()->mainFrame()->executeScript(
       WebScriptSource(WebString::fromUTF8("testRunner.notifyDone();")));
 }
 
 }  // namespace content