base: Remove the string logging from CHECK().

net/quic/chromium/quic_utils_chromium.h

Index: net/quic/chromium/quic_utils_chromium.h
diff --git a/net/quic/chromium/quic_utils_chromium.h b/net/quic/chromium/quic_utils_chromium.h
index 03b5b3911e0b5bac40d7b99b9ffb66d1f942a240..ed4545ecbe0a881920ca8abf0d8a645008dd7e20 100644
--- a/net/quic/chromium/quic_utils_chromium.h
+++ b/net/quic/chromium/quic_utils_chromium.h
@@ -35,7 +35,8 @@ const typename Collection::value_type::second_type& FindOrDie(
     const Collection& collection,
     const typename Collection::value_type::first_type& key) {
   typename Collection::const_iterator it = collection.find(key);
-  CHECK(it != collection.end()) << "Map key not found: " << key;
+  // Map key not found.
+  CHECK(it != collection.end());
   return it->second;
 }
 
@@ -45,7 +46,8 @@ typename Collection::value_type::second_type& FindOrDie(
     Collection& collection,  // NOLINT
     const typename Collection::value_type::first_type& key) {
   typename Collection::iterator it = collection.find(key);
-  CHECK(it != collection.end()) << "Map key not found: " << key;
+  // Map key not found.
+  CHECK(it != collection.end());
   return it->second;
 }