Add DEPS to content/browser/loader for sync_resource_handler*
Add DEPS to content/browser/loader for sync_resource_handler*

R=jam@chromium.org
TBR=wfh
BUG=598073

Review-Url: https://codereview.chromium.org/1927683002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#390172}

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