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jkummerow authored
For a prototype chain foo -> global_proxy -> global_object, we used to register a dependency from foo -> global_object. This is incorrect when the global_proxy/global_object pairing is modified, e.g. when navigating in iframes. With this patch, we properly register foo -> global_proxy and global_proxy -> global_object dependencies. Additionally, when a prototype's prototype changes from null to something else, this new usage relation must be registered if there are other users further down on the prototype chain that might expect a complete chain of registrations to exist (which was the case before, and must be preserved). BUG=chromium:571517 LOG=n R=verwaest@chromium.org Review URL: https://codereview.chromium.org/1559323002 Cr-Commit-Position: refs/heads/master@{#33119}
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