Continue with the FreeBSD port - this version builds and links, though...

chrome/browser/icon_loader.h

Index: chrome/browser/icon_loader.h
===================================================================
--- chrome/browser/icon_loader.h	(revision 25977)
+++ chrome/browser/icon_loader.h	(working copy)
@@ -68,8 +68,8 @@
 
   Delegate* delegate_;
 
-#if defined(OS_LINUX)
-  // On Linux we use gdk's pixbuf loader, which has to execute on the UI
+#if defined(USE_X11)
+  // On X/11 systems we use gdk's pixbuf loader, which has to execute on the UI
   // thread, so we only read the file on the background thread and parse it
   // on the main thread.
   void ParseIcon();