Convert SetVisuallyDeemphasized IPC to mojo

extensions/renderer/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//extensions/features/features.gni")
+import("//mojo/public/tools/bindings/mojom.gni")
 
 assert(enable_extensions)
 
 source_set("renderer") {
   sources = [
     "activity_log_converter_strategy.cc",
     "activity_log_converter_strategy.h",
     "api/automation/automation_api_helper.cc",
     "api/automation/automation_api_helper.h",
     "api/display_source/display_source_session.cc",
@@ skipping 209 matching lines @@
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 
   deps = [
     "//chrome:resources",
     "//components/guest_view/renderer",
     "//content:resources",
     "//extensions:extensions_resources",
     "//extensions/common/api",
+    "//extensions/renderer:mojo",
     "//gin",
     "//mojo/edk/js",
     "//mojo/public/js",
     "//skia",
     "//third_party/WebKit/public:blink",
     "//third_party/cld",
   ]
 
   if (proprietary_codecs && enable_wifi_display) {
     sources += [
@@ skipping 25 matching lines @@
       "api/display_source/wifi_display/wifi_display_video_encoder_vea.cc",
     ]
 
     deps += [
       "//third_party/openh264:encoder",
       "//third_party/wds:libwds",
     ]
   }
 }
 
+mojom("mojo") {
+  sources = [
+    "mojo/frame_observer.mojom",
+  ]
+}
+
 source_set("unit_tests") {
   testonly = true
   sources = [
     "activity_log_converter_strategy_unittest.cc",
     "api/mojo_private/mojo_private_unittest.cc",
     "api_binding_test.cc",
     "api_binding_test.h",
     "api_binding_test_util.cc",
     "api_binding_test_util.h",
     "api_binding_unittest.cc",
@@ skipping 47 matching lines @@
     "//ui/base",
   ]
 
   if (enable_wifi_display && proprietary_codecs) {
     sources += [
       "api/display_source/wifi_display/wifi_display_elementary_stream_descriptor_unittest.cc",
       "api/display_source/wifi_display/wifi_display_media_packetizer_unittest.cc",
     ]
   }
 }