DevTools: migrate off ASSERT in inspector protocol.

BUG=580337

Review-Url: https://codereview.chromium.org/2012523002
Cr-Original-Commit-Position: refs/heads/master@{#395953}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 3905c12981492102e63165a7b4e315dc6983922f
diff --git a/Values.cpp b/Values.cpp
index c2359da..9cc1ca5 100644
--- a/Values.cpp
+++ b/Values.cpp
@@ -345,7 +345,7 @@
 
 protocol::Value* ListValue::at(size_t index)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(index < m_data.size());
+    DCHECK_LT(index, m_data.size());
     return m_data[index];
 }