Rename omaha_client and similar tokens to update_client in all contexts.

extensions/shell/BUILD.gn

Index: extensions/shell/BUILD.gn
diff --git a/extensions/shell/BUILD.gn b/extensions/shell/BUILD.gn
index 19dc45112f44957f3937f12b75869887ae0e4c2b..e0b3261a3e9576e97743766b728ced77eafdc3ab 100644
--- a/extensions/shell/BUILD.gn
+++ b/extensions/shell/BUILD.gn
@@ -28,8 +28,8 @@ source_set("app_shell_lib") {
     ":version_header",
     "//base",
     "//base:prefs",
-    "//components/omaha_client",
     "//components/pref_registry",
+    "//components/update_client",
     "//components/user_prefs",
     "//components/web_cache/renderer",
     "//content",
@@ -110,8 +110,6 @@ source_set("app_shell_lib") {
     "browser/shell_network_delegate.h",
     "browser/shell_oauth2_token_service.cc",
     "browser/shell_oauth2_token_service.h",
-    "browser/shell_omaha_query_params_delegate.cc",
-    "browser/shell_omaha_query_params_delegate.h",
     "browser/shell_prefs.cc",
     "browser/shell_prefs.h",
     "browser/shell_runtime_api_delegate.cc",
@@ -122,6 +120,8 @@ source_set("app_shell_lib") {
     "browser/shell_special_storage_policy.h",
     "browser/shell_speech_recognition_manager_delegate.cc",
     "browser/shell_speech_recognition_manager_delegate.h",
+    "browser/shell_update_query_params_delegate.cc",
+    "browser/shell_update_query_params_delegate.h",
     "browser/shell_url_request_context_getter.cc",
     "browser/shell_url_request_context_getter.h",
     "browser/shell_web_contents_modal_dialog_manager.cc",