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The in-process DeltaUpdateOps don't require content/ and can be eventually used on iOS, whereas the out-of-process version needs to stay in chrome/.

Part 1d in design doc here: https://docs.google.com/document/d/1F76yNZCnPnGzgNXhI-sCFKlXulwx_s_OKTGbJS5NhbA/edit?usp=sharing

BUG=371463

Review URL: https://codereview.chromium.org/420503002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287484 0039d316-1c4b-4281-b951-d872f2087c98