Return frame/origin-bound URLLoaderFactory from WebViewPlugin/Helper.

This CL modifies WebViewPlugin::WebViewHelper::CreateURLLoaderFactory
method so that it delegates creation of URLLoaderFactory to the frame
that hosts the plugin.

Bug: 891872
Change-Id: I002503730f98adbced92d61c7d74eb53f4865e98
Reviewed-on: https://chromium-review.googlesource.com/c/1259824
Reviewed-by: Tommy Li <tommycli@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Ɓukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608632}
2 files changed