Move over to ABSL logging and flags.

Removes gperftools too since that wants gflags.

Here come the fireworks.

Change-Id: I79cb7bcf60f1047fbfa28bfffc21a0fd692e4b1c
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2016/BUILD b/y2016/BUILD
index 849f0f6..9c27142 100644
--- a/y2016/BUILD
+++ b/y2016/BUILD
@@ -18,8 +18,9 @@
         "//frc971:shifter_hall_effect",
         "//frc971/control_loops:state_feedback_loop",
         "//y2016/control_loops/drivetrain:polydrivetrain_plants",
-        "@com_github_google_glog//:glog",
         "@com_google_absl//absl/base",
+        "@com_google_absl//absl/log",
+        "@com_google_absl//absl/log:check",
     ],
 )
 
diff --git a/y2016/constants.cc b/y2016/constants.cc
index 0c65b11..ec17afb 100644
--- a/y2016/constants.cc
+++ b/y2016/constants.cc
@@ -10,7 +10,8 @@
 #endif
 
 #include "absl/base/call_once.h"
-#include "glog/logging.h"
+#include "absl/log/check.h"
+#include "absl/log/log.h"
 
 #include "aos/network/team_number.h"
 #include "aos/stl_mutex/stl_mutex.h"