Pull back some CHECK calls which were removed.

chrome/common/important_file_writer.cc

 // Copyright (c) 2011 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 "chrome/common/important_file_writer.h"
 
 #include <stdio.h>
 
 #include <string>
 
@@ skipping 32 matching lines @@
     }
 
     int flags = base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_WRITE;
     base::PlatformFile tmp_file =
         base::CreatePlatformFile(tmp_file_path, flags, NULL, NULL);
     if (tmp_file == base::kInvalidPlatformFileValue) {
       LogFailure(FAILED_OPENING, "could not open temporary file");
       return;
     }
 
-    DCHECK_LE(data_.length(), static_cast<size_t>(kint32max));
+    // If this happens in the wild something really bad is going on.
+    CHECK_LE(data_.length(), static_cast<size_t>(kint32max));
     int bytes_written = base::WritePlatformFile(
         tmp_file, 0, data_.data(), static_cast<int>(data_.length()));
     base::FlushPlatformFile(tmp_file);  // Ignore return value.
 
     if (!base::ClosePlatformFile(tmp_file)) {
       LogFailure(FAILED_CLOSING, "failed to close temporary file");
       file_util::Delete(tmp_file_path, false);
       return;
     }
 
@@ skipping 97 matching lines @@
   DCHECK(serializer_);
   std::string data;
   if (serializer_->SerializeData(&data)) {
     WriteNow(data);
   } else {
     DLOG(WARNING) << "failed to serialize data to be saved in "
                   << path_.value();
   }
   serializer_ = NULL;
 }