OnionSoup: Move URLLoaderFactoryBundle from content/ to blink/

As a part of the Onion Soup project, this CL moves files for
URLLoaderFactoryBundle as follows:

1) from content/common/ to blink/public/common/loader/

  - url_loader_factory_bundle.h
  - url_loader_factory_bundle.typemap
  - url_loader_factory_bundle_struct_traits.h
    (renamed to url_loader_factory_bundle_mojom_traits.h)

2) from content/common/ to blink/common/loader/

  - url_loader_factory_bundle.cc
  - url_loader_factory_bundle_struct_traits.cc
    (renamed to url_loader_factory_bundle_mojom_traits.cc)

3) from content/common/ to blink/public/mojom/loader/

  - url_loader_factory_bundle.mojom

Change-Id: I18aff72e7201ec78890414b30903e9aaa9b32455
Bug: 906991
Reviewed-on: https://chromium-review.googlesource.com/c/1354741
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619003}
50 files changed