Pass around preferred language to font fallback selection.

content/browser/renderer_host/render_sandbox_host_linux.cc

Index: content/browser/renderer_host/render_sandbox_host_linux.cc
diff --git a/content/browser/renderer_host/render_sandbox_host_linux.cc b/content/browser/renderer_host/render_sandbox_host_linux.cc
index 1b36fbadbe1c010f3f8c285b58bcfe21ddc3520c..d84a121b941e98668ea2ae43fa5d57cdfc98813e 100644
--- a/content/browser/renderer_host/render_sandbox_host_linux.cc
+++ b/content/browser/renderer_host/render_sandbox_host_linux.cc
@@ -256,6 +256,12 @@ class SandboxIPCProcess  {
       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);
 
     Pickle reply;