Blink: do not generate blink variant for public_typemaps

Public typemaps may use non-wtf types, since they are consumed by embedder.
Generating blink variant for them fails. One example would be a manifest
typemap which currently resides in content, but will be moved to blink.

Those typemaps which can be used inside blink (and are used already)
are added to blink_typemaps instead. These are usually enum typemaps
and can be shared verbatim between variants.

Bug: none
Change-Id: Ifd969c6de92e6e0507b40b2426e0b33119ea599b
Reviewed-on: https://chromium-review.googlesource.com/1015228Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Ken Rockot <rockot@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552844}

mojo/public/tools/bindings/blink_bindings_configuration.gni

@@ -10,7 +10,6 @@ _typemap_imports = [
   "//mojo/public/cpp/bindings/tests/blink_typemaps.gni",
   "//third_party/blink/renderer/platform/mojo/blink_typemaps.gni",
   "//third_party/blink/public/blink_typemaps.gni",
-  "//third_party/blink/public/public_typemaps.gni",
 ]
 _typemaps = []
 

third_party/blink/public/public_typemaps.gni

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# These are typemaps which are shared between Blink public and its embedder.
+# These are typemaps which are exposed by Blink to its embedder.
 typemaps = [
   "//third_party/blink/public/platform/content_security_policy.typemap",
   "//third_party/blink/public/platform/display_mode.typemap",

third_party/blink/renderer/platform/mojo/blink_typemaps.gni

@@ -17,7 +17,9 @@ typemaps = [
   "//third_party/blink/renderer/platform/mojo/security_origin.typemap",
   "//third_party/blink/renderer/platform/mojo/string.typemap",
   "//third_party/blink/renderer/platform/mojo/time.typemap",
+  "//third_party/blink/public/platform/display_mode.typemap",
   "//third_party/blink/public/platform/modules/bluetooth/bluetooth.typemap",
   "//third_party/blink/public/platform/modules/fetch/fetch_api_request.typemap",
   "//third_party/blink/public/platform/modules/notifications/notification_types.typemap",
+  "//third_party/blink/public/common/screen_orientation/screen_orientation_lock_types.typemap",
 ]