base: Remove the string logging from CHECK().

tools/gn/command_format.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/gn/command_format.h"
 
 #include <stddef.h>
 
 #include <sstream>
 
@@ skipping 619 matching lines @@
   } else if (const LiteralNode* literal = root->AsLiteral()) {
     Print(literal->value().value());
   } else if (const UnaryOpNode* unaryop = root->AsUnaryOp()) {
     Print(unaryop->op().value());
     Expr(unaryop->operand(), kPrecedenceUnary, std::string());
   } else if (const BlockCommentNode* block_comment = root->AsBlockComment()) {
     Print(block_comment->comment().value());
   } else if (const EndNode* end = root->AsEnd()) {
     Print(end->value().value());
   } else {
-    CHECK(false) << "Unhandled case in Expr.";
+    // Unhandled case in Expr.
+    CHECK(false);
   }
 
   if (parenthesized)
     Print(")");
 
   // Defer any end of line comment until we reach the newline.
   if (root->comments() && !root->comments()->suffix().empty()) {
     std::copy(root->comments()->suffix().begin(),
               root->comments()->suffix().end(),
               std::back_inserter(comments_));
@@ skipping 423 matching lines @@
         }
         printf("Wrote formatted to '%s'.\n", to_write.AsUTF8Unsafe().c_str());
       }
     }
   }
 
   return 0;
 }
 
 }  // namespace commands