Pull back some CHECK calls which were removed.

chrome/common/important_file_writer.cc

Index: chrome/common/important_file_writer.cc
diff --git a/chrome/common/important_file_writer.cc b/chrome/common/important_file_writer.cc
index c5e4cf8cd5272dcf34b166499a6afb347d8fffc5..bd02f878901c099a64b5f066f11efacd70afc6c8 100644
--- a/chrome/common/important_file_writer.cc
+++ b/chrome/common/important_file_writer.cc
@@ -50,7 +50,8 @@ class WriteToDiskTask : public Task {
       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.