base: Remove the string logging from CHECK().

third_party/protobuf/src/google/protobuf/stubs/map_util.h

Index: third_party/protobuf/src/google/protobuf/stubs/map_util.h
diff --git a/third_party/protobuf/src/google/protobuf/stubs/map_util.h b/third_party/protobuf/src/google/protobuf/stubs/map_util.h
index 4cccbbedcbbfe7bd078b81b6cddb255c1cd7568b..abb3b94ea9bf96b3c995e7269f256ab7e171ec50 100644
--- a/third_party/protobuf/src/google/protobuf/stubs/map_util.h
+++ b/third_party/protobuf/src/google/protobuf/stubs/map_util.h
@@ -208,7 +208,8 @@ typename Collection::value_type::second_type::element_type&
 FindLinkedPtrOrDie(const Collection& collection,
                    const typename Collection::value_type::first_type& key) {
   typename Collection::const_iterator it = collection.find(key);
-  CHECK(it != collection.end()) <<  "key not found: " << key;
+  // key not found.
+  CHECK(it != collection.end());
   // Since linked_ptr::operator*() is a const member returning a non const,
   // we do not need a version of this function taking a non const collection.
   return *it->second;
@@ -337,14 +338,16 @@ bool InsertIfNotPresent(
 template <class Collection>
 void InsertOrDie(Collection* const collection,
                  const typename Collection::value_type& value) {
-  CHECK(InsertIfNotPresent(collection, value)) << "duplicate value: " << value;
+  // duplicate value.
+  CHECK(InsertIfNotPresent(collection, value));
 }
 
 // Same as above except doesn't log the value on error.
 template <class Collection>
 void InsertOrDieNoPrint(Collection* const collection,
                         const typename Collection::value_type& value) {
-  CHECK(InsertIfNotPresent(collection, value)) << "duplicate value.";
+  // duplicate value.
+  CHECK(InsertIfNotPresent(collection, value));
 }
 
 // Inserts the key-value pair into the collection. Dies if key was already