Change includes of histogram.h to histogram_macros.h.

crypto/mock_apple_keychain.cc

Index: crypto/mock_apple_keychain.cc
diff --git a/crypto/mock_apple_keychain.cc b/crypto/mock_apple_keychain.cc
index dd3d7c52743218fc68af40817d8abed0cebf3d27..f73ba2411b22e2ce24f45176ad3c56f4d541b4c1 100644
--- a/crypto/mock_apple_keychain.cc
+++ b/crypto/mock_apple_keychain.cc
@@ -2,11 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "crypto/mock_apple_keychain.h"
+
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/time/time.h"
-#include "crypto/mock_apple_keychain.h"
 
 namespace {