Move ReadingList model to components/reading_list/core

ios/chrome/browser/reading_list/BUILD.gn

Index: ios/chrome/browser/reading_list/BUILD.gn
diff --git a/ios/chrome/browser/reading_list/BUILD.gn b/ios/chrome/browser/reading_list/BUILD.gn
index c4b116bf07aee92133de26a954f9827105d794a0..fdc22348a536aa255372b05111b937bf3d68c5ff 100644
--- a/ios/chrome/browser/reading_list/BUILD.gn
+++ b/ios/chrome/browser/reading_list/BUILD.gn
@@ -37,6 +37,7 @@ source_set("reading_list") {
     "//components/pref_registry",
     "//components/prefs",
     "//components/reading_list/core",
+    "//components/reading_list/core:flags",
     "//components/reading_list/ios",
     "//components/sync",
     "//ios/chrome/browser",
@@ -63,7 +64,7 @@ source_set("reading_list_remover") {
   ]
   deps = [
     "//base",
-    "//components/reading_list/ios",
+    "//components/reading_list/core",
     "//ios/chrome/browser/browser_state",
   ]
 }
@@ -82,7 +83,7 @@ source_set("unit_tests") {
     "//base",
     "//base/test:test_support",
     "//components/favicon/ios",
-    "//components/reading_list/ios",
+    "//components/reading_list/core",
     "//ios/chrome/browser",
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/dom_distiller",