Save favicon during reading list distillation

ios/chrome/browser/dom_distiller/BUILD.gn

Index: ios/chrome/browser/dom_distiller/BUILD.gn
diff --git a/ios/chrome/browser/dom_distiller/BUILD.gn b/ios/chrome/browser/dom_distiller/BUILD.gn
index 67b4e9e30af5a4bb68066b54a345daa4a315539e..809293d94f2868aadc172630b245523d4a8292bd 100644
--- a/ios/chrome/browser/dom_distiller/BUILD.gn
+++ b/ios/chrome/browser/dom_distiller/BUILD.gn
@@ -8,19 +8,44 @@ source_set("dom_distiller") {
     "distiller_viewer.h",
     "dom_distiller_service_factory.cc",
     "dom_distiller_service_factory.h",
+    "favicon_web_state_dispatcher_impl.h",
+    "favicon_web_state_dispatcher_impl.mm",
   ]
   deps = [
     "//base",
-    "//components/dom_distiller/core",
     "//components/dom_distiller/ios",
+    "//components/favicon/core",
+    "//components/favicon/ios",
     "//components/keyed_service/core",
     "//components/keyed_service/ios",
     "//components/leveldb_proto",
+    "//ios/chrome/browser/bookmarks",
     "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/favicon",
+    "//ios/chrome/browser/history",
+    "//ios/public/provider/web",
     "//ios/web",
     "//ui/gfx",
+    "//url",
   ]
   public_deps = [
     "//components/dom_distiller/core",
   ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "favicon_web_state_dispatcher_impl_unittest.mm",
+  ]
+  deps = [
+    ":dom_distiller",
+    "//base",
+    "//components/favicon/ios",
+    "//ios/chrome/browser/browser_state:test_support",
+    "//ios/testing:ios_test_support",
+    "//ios/web",
+    "//ios/web:test_support",
+    "//testing/gtest",
+  ]
+}