Move ReadingList model to components/reading_list/core

components/reading_list/core/BUILD.gn

Index: components/reading_list/core/BUILD.gn
diff --git a/components/reading_list/core/BUILD.gn b/components/reading_list/core/BUILD.gn
index f45b10c0b421a0dfb83bfe035648d24655d0c021..a5d4f131998fd90cdae278fcf7e6dfcd726ccc10 100644
--- a/components/reading_list/core/BUILD.gn
+++ b/components/reading_list/core/BUILD.gn
@@ -7,13 +7,67 @@ import("//components/reading_list/core/reading_list.gni")
 
 source_set("core") {
   sources = [
+    "offline_url_utils.cc",
+    "offline_url_utils.h",
+    "reading_list_entry.cc",
+    "reading_list_entry.h",
+    "reading_list_model.cc",
+    "reading_list_model.h",
+    "reading_list_model_impl.cc",
+    "reading_list_model_impl.h",
+    "reading_list_model_observer.h",
+    "reading_list_model_storage.cc",
+    "reading_list_model_storage.h",
+    "reading_list_pref_names.cc",
+    "reading_list_pref_names.h",
+    "reading_list_store.cc",
+    "reading_list_store.h",
+    "reading_list_store_delegate.h",
+  ]
+  deps = [
+    ":flags",
+    "//base",
+    "//components/keyed_service/core",
+    "//components/prefs",
+    "//components/sync",
+    "//net",
+    "//url",
+  ]
+  public_deps = [
+    "//components/reading_list/core/proto",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "offline_url_utils_unittest.cc",
+    "reading_list_entry_unittest.cc",
+    "reading_list_model_unittest.cc",
+    "reading_list_store_unittest.cc",
+  ]
+  deps = [
+    ":core",
+    "//base",
+    "//base/test:test_support",
+    "//components/sync",
+    "//components/sync:test_support_model",
+    "//testing/gtest",
+    "//url",
+  ]
+}
+
+source_set("flags") {
+  sources = [
     "reading_list_switches.cc",
     "reading_list_switches.h",
   ]
   deps = [
-    ":reading_list_enable_flags",
     "//base",
   ]
+  public_deps = [
+    ":reading_list_enable_flags",
+  ]
 }
 
 buildflag_header("reading_list_enable_flags") {