Remove obsoleted interface for fallback font selection on Linux.

content/browser/renderer_host/render_sandbox_host_linux.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.
 
 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 
 #include <fcntl.h>
 #include <fontconfig/fontconfig.h>
 #include <stdint.h>
 #include <unistd.h>
@@ skipping 242 matching lines @@
         return;
       }
 
       chars[i] = c;
     }
 
     std::string preferred_locale;
     if (!pickle.ReadString(&iter, &preferred_locale))
       return;
 
-    // TODO(kochi): Pass preferred_locale.c_str() as the third parameter
-    // once https://bugs.webkit.org/show_bug.cgi?id=55453 is landed.
-    WebCString family = WebFontInfo::familyForChars(chars.get(), num_chars);
+    WebCString family = WebFontInfo::familyForChars(chars.get(),
+                                                    num_chars,
+                                                    preferred_locale.c_str());
 
     Pickle reply;
     if (family.data()) {
       reply.WriteString(family.data());
     } else {
       reply.WriteString("");
     }
     SendRendererReply(fds, reply, -1);
   }
 
@@ skipping 408 matching lines @@
 }
 
 RenderSandboxHostLinux::~RenderSandboxHostLinux() {
   if (initialized_) {
     if (HANDLE_EINTR(close(renderer_socket_)) < 0)
       PLOG(ERROR) << "close";
     if (HANDLE_EINTR(close(childs_lifeline_fd_)) < 0)
       PLOG(ERROR) << "close";
   }
 }