base: Remove the string logging from CHECK().

net/base/address_tracker_linux_unittest.cc

Index: net/base/address_tracker_linux_unittest.cc
diff --git a/net/base/address_tracker_linux_unittest.cc b/net/base/address_tracker_linux_unittest.cc
index 88031c7dce054b670488af57a71977500b363eec..c12163e5e9be60901c222a2a20747f7e01a7d462 100644
--- a/net/base/address_tracker_linux_unittest.cc
+++ b/net/base/address_tracker_linux_unittest.cc
@@ -129,8 +129,8 @@ class NetlinkMessage {
   }
 
   void AddPayload(const void* data, size_t length) {
-    CHECK_EQ(static_cast<size_t>(NLMSG_HDRLEN),
-             buffer_.size()) << "Payload must be added first";
+    // Payload must be added first.
+    CHECK_EQ(static_cast<size_t>(NLMSG_HDRLEN), buffer_.size());
     Append(data, length);
     Align();
   }