Move site_engagement.mojom to chrome/browser/engagement.

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 4229 matching lines @@
     "-E",
     "root_gen_dir=" + rebase_path(root_gen_dir, root_build_dir),
   ]
 
   deps = [
     ":chrome_internal_resources_gen",
 
     # Depend only on the generated mojo bindings since we read the .mojom.js
     # file, rather than the whole mojo target which will link the C++ bindings.
     "//chrome/app:chrome_content_manifest_overlays",
-    "//chrome/browser/ui/webui/engagement:mojo_bindings__generator",
+    "//chrome/browser/engagement:mojo_bindings__generator",
     "//chrome/browser/ui/webui/omnibox:mojo_bindings__generator",
     "//chrome/browser/ui/webui/usb_internals:mojo_bindings__generator",
     "//device/bluetooth/public/interfaces:experimental_interfaces__generator",
     "//device/bluetooth/public/interfaces:interfaces__generator",
     "//url/mojo:url_mojom_gurl__generator",
     "//url/mojo:url_mojom_origin__generator",
   ]
 
   if (use_vulcanize) {
     deps += [
@@ skipping 347 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_manifest") {
   name = "preferences"
   source = "prefs/preferences_manifest.json"
 }