libchromeos: Migrate bind_lambda.h from Buffet

Now that libchromeos is converted to C++11 I can finally move
this common code to the place where it belongs and can be
reused by different projects.

BUG=chromium:405714
TEST=USE=buffet ./build_packages

Change-Id: I6605d2ccc61b33627cfaaa9b868dc404cf78dd0c
Reviewed-on: https://chromium-review.googlesource.com/213320
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Bertrand Simonnet <bsimonnet@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/buffet/http_utils_unittest.cc b/buffet/http_utils_unittest.cc
index 190b566..22c2209 100644
--- a/buffet/http_utils_unittest.cc
+++ b/buffet/http_utils_unittest.cc
@@ -6,9 +6,9 @@
 #include <vector>
 
 #include <base/values.h>
+#include <chromeos/bind_lambda.h>
 #include <gtest/gtest.h>
 
-#include "buffet/bind_lambda.h"
 #include "buffet/http_transport_fake.h"
 #include "buffet/http_utils.h"
 #include "buffet/mime_utils.h"