Enforce crash key registration in SetCrashKeyValue.

base/debug/crash_logging.cc

Index: base/debug/crash_logging.cc
diff --git a/base/debug/crash_logging.cc b/base/debug/crash_logging.cc
index 6a36a916c62dcd2e102eafbcea28b1c2206670b6..acbc16d3b0cb79da215980ff1ba33595708797d9 100644
--- a/base/debug/crash_logging.cc
+++ b/base/debug/crash_logging.cc
@@ -51,9 +51,8 @@ void SetCrashKeyValue(const base::StringPiece& key,
 
   const CrashKey* crash_key = LookupCrashKey(key);
 
-  // TODO(rsesek): Do this:
-  //DCHECK(crash_key) << "All crash keys must be registered before use "
-  //                  << "(key = " << key << ")";
+  DCHECK(crash_key) << "All crash keys must be registered before use "
+                    << "(key = " << key << ")";
 
   // Handle the un-chunked case.
   if (!crash_key || crash_key->max_length <= g_chunk_max_length_) {