Replace ASSERT with DCHECK_EQ as appropriate

third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp

Index: third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
diff --git a/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp b/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
index a4ca3901427c5c2516a32b2cf8ea87f4f163e76d..691d3df715fb3c037b4079e3bc513b0927dd2bbd 100644
--- a/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
+++ b/third_party/WebKit/Source/platform/mhtml/MHTMLParser.cpp
@@ -303,7 +303,7 @@ ArchiveResource* MHTMLParser::ParseNextPart(
       return nullptr;
     }
     end_of_part_reached = true;
-    DCHECK_EQ(next_chars.size(), 2UL);
+    DCHECK(next_chars.size() == 2);
     end_of_archive_reached = (next_chars[0] == '-' && next_chars[1] == '-');
     if (!end_of_archive_reached) {
       String line = line_reader_.NextChunkAsUTF8StringWithLatin1Fallback();