Remove content/common/content_security_policy/* from native_types.

There are no more used since:
https://chromium-review.googlesource.com/c/chromium/src/+/2000640

Only: content/common/content_security_policy/csp_context.h needs to
stay. It contains the definition of CSPViolationParams, which is still a
native struct (for now).

See UnifyCSP:
https://docs.google.com/document/d/1v5mJnXJ5dSVXE_rgvJnNM9bzH0ni0YzdhPQ7GLqyhao

Bug: 1021462
Change-Id: I7227fd6b9a75ac24b5e7c60c93c2f0c48dfa6464
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2022673
Commit-Queue: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Auto-Submit: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735681}

content/common/native_types.typemap

@@ -5,11 +5,7 @@
 mojom = "//content/common/native_types.mojom"
 public_headers = [
   "//cc/input/touch_action.h",
-  "//content/common/content_security_policy/content_security_policy.h",
   "//content/common/content_security_policy/csp_context.h",
-  "//content/common/content_security_policy/csp_directive.h",
-  "//content/common/content_security_policy/csp_source.h",
-  "//content/common/content_security_policy/csp_source_list.h",
   "//content/common/cursors/webcursor.h",
   "//content/common/edit_command.h",
   "//content/common/frame_owner_properties.h",